Top 30 Diamond Testers on Amazon (Verified You can Buy)
Top 1
Diamond Tester High Accuracy Diamond Tester Pen Jewelry Diamond Tester Professional Diamond Selector Diamond Tester Kit for Novice and Expert, Thermal Conductivity Meter (Diamond Tester)
Mollo
DT-1
5.9055 x 1.5748 x 1.1811 inches
0.3395 Pounds
Ratings for Mollo (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Molo Electronics | - | ❌ | ❌ | ❌ |
Features
✔This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes.
✔Professional Diamond Selector II will indicate genuine diamond or fake,Lcd display & led indicator.Emits audible sounds to easily differentiate the readings,Portable electronic device for distinguishing real diamonds from other simulated stones.
Top 2
Diamond SE Tester- Professional Diamond & Moissanite Detector, 2-Second Results with LED/Sound Alert, Portable Gemstone Tester for Jewelry, Pawn Shops, Home Use (Includes Case & Batteries)
UVER
DFG-SE-F3
6.4 x 1.6 x 0.9 inches
Ratings for UVER (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| UVER | - | ❌ | ❌ | ❌ |
Features
INSTANT, LAB-PRECISE RESULTS: Accurately distinguish between genuine diamonds and moissanite, cubic zirconia, or other simulants in just 2 seconds. Our advanced thermal conductivity sensor provides professional-grade accuracy you can trust for buying, selling, or appraising jewelry.
CLEAR DUAL ALERT SYSTEM: Get unmistakable verification with a bright GREEN LED light and audible beep for real diamonds, and a RED LED light for imitations. Features adjustable volume and a convenient "Battery OK" indicator for reliable operation every time.
Top 3
Professional 2pt Jewel Stone Combo Tester Kit for Diamond, Moissanite, Metal and Gemstone Selection - High Accuracy Jeweler Test Meter Device for Novice and Expert
TEKCOPLUS
DMTK-83
8.5 x 4.72 x 1.97 Inches
0.1433 pounds
Ratings for TEKCOPLUS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Tekcoplus | - | ✅ | ✅ | ✅ |
Features
BUILT-IN METAL DETECTOR: Keep your work environment safe and secure with the built-in metal detector, which ensures that no unwanted metals or debris are left behind.
FAST WARM-UP TIME: With a quick and efficient warm-up time of only about 25 seconds, you can get to work right away and make the most of your valuable time.
Top 4
Valkynos Diamond Tester Pen with UV Light
Valkynos
Mercury-Free Zinc-Carbon Battery 6F22 9V
7.2 x 1.8 x 0.8 Inches
Ratings for Valkynos (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Valkynos Industries | - | ❌ | ❌ | ❌ |
Features
✅【 30-DAY HASSLE-FREE RETURNS 】✅ We offer a 30-day unconditional return or exchange. Includes a Standard 9V Battery (same type available in the U.S., easily replaceable) for immediate testing.
💎【 ELIMINATE PURCHASE UNCERTAINTY 】💎 Identify genuine diamonds instantly. Accurately distinguish authentic diamonds from simulants like cubic zirconia, glass, crystal, or white sapphire using advanced thermal conductivity. Perfect for screening inherited collections or verifying finds at flea markets and pawn shops. (Note: Not for rubies, emeralds, or pearls.)
Top 5
Professional Diamond Tester Pen, High Accuracy Jewelry Diamond Tester, Electronic Diamond Gem Tester and Tester Pen 60X Magnifying Glasses Tool Kit for Novice Expert (Diamond Tester Pen)
Hqdz-td
TD-171
6.0 x 1.2 x 1.0 inches
Ratings for Hqdz-td (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ying-hao technology | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
💎【Easy to use】 Place the tip of the diamond tester gently on the gemstone. If the diamond is fake, crystalline or cubic zirconia, the tester will not beep. An excellent diamond tester tool kit, suitable for handling any exposed or mounted diamonds and gems. Popular among professionals, hobbyists, coin enthusiasts, and business owners alike. Excellent tools. Excellent Value. Great gift idea.
💎【Intuitive design】 Our gemstone tester has an intuitive design, light and portable, and the jewelry diamond tester is equipped with LED lights and audio instructions. As long as the tip is perpendicular to the test masonry and the switch is pressed, the result can be obtained.
Top 6
Diamond Tester Jewelry Gem Stone Tester Kit – Professional 2-in-1 Tester for Diamonds, Moissanite, Metals, and Gemstones
TEKCOPLUS
TK083PLUS
6.811 x 1.6535 x 0.8661 Inches
0.1433 pounds
Ratings for TEKCOPLUS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Tekcoplus | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Integrated Metal Detector: This feature helps locate and eliminate undesired metals or rubbish, ensuring a safe and tidy work area
Quick Warm-Up: Make the most of your time by starting quickly with a warm-up that takes just 25 seconds
Top 7
Diamond Tester,High Accuracy Diamond Tester Pen＋60X Mini LED Magnifying Jeweler Tool Kit,Professional Jewelry Diamond Selector for Novice and Expert, Thermal Conductivity Meter(Diamond Tester)
Hqdz-td
TD-171
6.0 x 1.2 x 1.0 inches
Ratings for Hqdz-td (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ying-hao technology | - | ❌ | ❌ | ❌ |
Features
💎【Intuitive Design】Hqdz-td Diamond Tester Pen comes with LED lights and audio indication. During a test, if the stone tested is a diamond, the LED lights will light up as the stone passes each test conducted by the Diamond detector. Once our Diamond Tester Pen has completed all of its tests, the pen will make a beep sound as well as show a row of fully lite LED lights.
💎【Simple to Use】Hqdz-td Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep.
Top 8
HMKIS Diamond Tester ＋ 200g/0.01g Jewelry Scale + 30X 60X 90X Jewelers Loupe, Powered by USB & 9V Battery, Diamond Selector for Novice, Thermal Conductivity Meter(Non-Rechargeable) (Black)
HMKIS
Jewelry Scale diamond tester
8.23 x 7.0 x 1.3 inches
0.4409 pounds
Ratings for HMKIS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| HMKIS | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
[Power Upgrade] The HMKIS diamond tester offers two power supply options: Type-C & 9V Power. Opting for the Type-C power supply is highly recommended for optimal performance. PLZ NOTE THIS IS Non-Rechargeable !
[Technical Upgrade]: Utilizing a brand-new production process, the equipment is less prone to damage and durable for a long time.
Top 9
Diamond Tester Pen Rechargeable with UV Light,High Accuracy Jewelry Diamond Tester,Electronic Diamond Gem Tester and Tester Pen-Diamond Selector for Novice and Expert(Diamond Tester Pen)
Hqdz
ZS-172
6.5 x 1.2 x 1.2 Inches
Ratings for Hqdz (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Hai-electronic | - | ❌ | ❌ | ❌ |
Features
✅💎Intuitive Design Quick and Safe - Our diamond tester features an LCD display and LED indicator make it easy to read your precise testing results. Designed for quick, precise, and safe diamond testing, this diamond selector tester ensures that there is no harm to diamonds during the testing process. providing accurate results every time. Popular among professionals, hobbyists, coin enthusiasts, and business owners alike. Excellent tools. Excellent Value. Great gift idea.
✅💎Effortless Testing - Key operation, at a glance.No need for a professional - the Hqdz Diamond Tester Pen is easy to operate. Just turn it on, lightly press the tip to the gemstone, and wait for the beep to know if it's real or fake.If it's Real Diamond.The professional Diamond Tester will lighted up over 9 and emits audible sounds. No reaction means the stone is a fake crystal or simulant like cubic zirconium (CZ).
Top 10
High Accuracy Diamond Tester Pen, Gemstone Identification Tool for Jewelers, Portable Gem Detector with Light & Beep Prompt
Generic
RR-D
5.31 x 0.87 x 1.57 Inches
Ratings for Generic (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Dyfizer Direct | - | ❌ | ❌ | ❌ |
Features
All-in-One Ready-to-Use Kit: Comes with tester pen, leather storage pouch, stable testing platform, user manual and 9V battery—no extra purchase, usable right out of the box.
Intuitive Gem Identification: Equipped with high-precision sensor, the tester displays different light numbers and beeps for various gems, easily distinguishing real diamonds/moissanite from glass, CZ, jade and crystal.
Top 11
HMJOY Diamond Tester, High Accuracy Simple Operation Jewelry Diamond Tester, New Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter (Black)
HMJOY
2025basic
7.0 x 3.0 x 1.4 inches
0.3748 Pounds
Ratings for HMJOY (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| HMJOY | - | ❌ | ❌ | ❌ |
Features
[Power Upgrade] The HMJOY diamond tester offers two power supply options: Type-C and 9V Power (includes a 1m Type-C cable and 9V battery). Opting for the Type-C power supply is highly recommended for optimal performance. PLZ NOTE THIS IS Non-Rechargeable !
[Easy Use]The HMJOY Diamond Tester Pen is a user-friendly tool that eliminates the need for professional knowledge in diamond testing. By selecting the diamond size, and placing the tip of the tester on the gemstone, users can easily identify whether the stone is a genuine diamond or if it is made of glass, crystal, or cubic zirconia based on the results. The red light and beep emitted by the diamond tester indicate the presence of a diamond, making it a convenient and easy-to-use tool for anyone in need of quick and accurate diamond testing.
Top 12
Diamond Tester High Accuracy Diamond Tester Pen,Environmental Protection 9V Battery,Professional Diamond Selector for Jeweler Novice and Expert,Thermal Conductivity Meter (Diamond Tester)
Hqdz-td
Y-sss1
0.3307 pounds
Ratings for Hqdz-td (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ying-hao technology | - | ❌ | ❌ | ❌ |
Features
✔💎Diamond Detection: Effortlessly distinguish real diamonds from other stones using the diamond indicator, which emits a green light when a real diamond is detected.
✔💎Professional Diamond Selector will indicate genuine diamond or fake,LCD display & LED indicator.Portable electronic device for distinguishing real diamonds from other simulated stones.
HMKIS Diamond Tester Pen, High Accuracy Jewelry Diamond Tester＋ 60X Mini LED Magnifying, Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter
HMKIS
HXK+FDJ
10.1575 x 2.1654 x 1.378 inches
0.2646 Pounds
Ratings for HMKIS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| HMKIS | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
[Easy to Use]: Real Diamond will Emits sounds and lights >=9.
[Intuitive Design]: Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9.
High Accuracy Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black)
Hqdz
Hqdz
3.937 x 1.5748 x 1.1811 inches
0.33 pounds
Ratings for Hqdz (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Hai-electronic | - | ✅ | ✅ | ✅ |
Features
[Fast and safe ]:Professional Diamond Selector II will indicate genuine diamond or fake.It is designed for quick, precise, and safe diamond testing.
[Intuitive Design]:LCD display & LED indicator.Uses large / small switches for testing diamonds,Emits audible sounds to easily differentiate the readings.
High Accuracy Professional Diamond Tester Pen, Jewelry Diamond Tester with 60X Mini LED Magnifying&40X Full Metal Illuminated Jewelry Loop Magnifier,Diamond Selector for Novice and Expert
Hqdz-td
HQ-zf01
7.0 x 1.0 x 1.5 inches
Ratings for Hqdz-td (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ying-hao technology | - | ❌ | ❌ | ❌ |
Features
●💎It is designed for quick, precise, and safe diamond testing. ▲💎【Professional Diamond Selector】 After powering on, turn the wheel to keep 4 green lights on to finish the Initialization. Otherwise you will get inaccurate results.For Diamond Simulants：No Sound and No Red lamps light on.[Note]: This diamond tester cannot distinguish Mosanite and diamonds. Because the product works by measuring the thermal conductivity of an object. The thermal conductivity of Mosanite is almost the same as diamond.
▲💎【Intuitive Design】Our diamond tester features an LCD display and LED indicator make it easy to read your precise testing results. No need for a professional - the Hqdz-td Diamond Tester Pen is easy to operate. Just turn it on, lightly press the tip to the gemstone, and wait for the beep to know if it's real or fake.
Valkynos Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor – Fast 0.5s Detection, Portable Gem Checker for Novice & Experts – Battery Included
Valkynos
Mercury-Free Zinc-Carbon Battery 6F22 9V
7.2 x 1.8 x 0.8 inches
0.25 pounds
Ratings for Valkynos (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Valkynos Industries | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
After-Sales Service: 30-day unconditional return or exchange. For any issues or battery replacement (same type available in the U.S.), please contact us
【Fast & Accurate Diamond Verification】The high-accuracy diamond tester pen has advanced thermal conductivity; this tester accurately distinguishes real diamonds from common fakes like crystal or cubic zirconia. Ideal for home use, collectors, or resellers
Top 17
Rechargeable Professional Diamond Tester Pen with UV Light,Rechargeable Diamond Tester Pen＋200g/0.01g Mini Jewelry Scale＋60X Mini LED Magnifying,Professional Diamond for Novice and Expert
UVER
CF-45-FAV
7.874 x 2.126 x 1.0236 Inches
Ratings for UVER (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| UVER | - | ❌ | ❌ | ❌ |
Features
💎💎💎Precision & Safety Key operation,Simple to Usem - Please put the pen tip vertically and gently on the test stone.Please adjust according to the size of the stone to be measured. Instrument up/down button, according to the number of carats displayed below the instrument adjustment, you do not need to set the exact number of carats.But remember, for diamonds (greater than 1.0 carats), please turn on 1 green light; For diamonds (0.5 carats), turn on 2 green lights. For small gems (such as cuts or cones), turn on 3-4 green lights. (Please pay special attention not to touch the keys on the instrument during testing).
💎💎💎Intuitive Design Quick and Safe - Our diamond tester features an LCD display and LED indicator make it easy to read your precise testing results. Designed for quick, precise, and safe diamond testing, this diamond selector tester ensures that there is no harm to diamonds during the testing process. providing accurate results every time. Popular among professionals, hobbyists, coin enthusiasts, and business owners alike. Excellent tools. Excellent Value. Great gift idea.
Diamond Tester, Professional Jewelers' Gemstone Detector, High Accuracy Diamond Checker Pen Professional for Jewelers, Gem Tester (Jewelry-Only Detection)
Siziviki
20
5.31 x 0.87 x 1.57 inches
0.22 Pounds
Ratings for Siziviki (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Siziviki | - | ❌ | ❌ | ❌ |
Features
ACCURATE DETECTION : Our professional diamond tester pen (a reliable gem tester) features a sophisticated sensor for precise gemstone identification (Diamonds/Moissanite: 9+ lights + beeps; Jade: 5-6 lights; Crystal/Glass: 5-7 lights). (Jewelry-Only Detection – Not for metal/gold or gold testing kit use)
STANDARD OPERATION : Insert battery (Gently press the wire and the cables to hold battery will secure it in place) → Power on → MUST preheat 30s (critical) → Adjust indicator to 4th mark (do not skip) → Hold back metal plate → Probe 90° perpendicular to gemstone. Reset to 4th mark before each test
Jewelry Diamond Tester Pen Professional Tool with Magnifier & Battery
SZCXTOP
ZS-2
6.3 x 0.8 x 1.58 inches
0.3 Pounds
Ratings for SZCXTOP (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| HuGou US | - | ❌ | ❌ | ❌ |
Features
【Package include】- 1 x Diamond Tester Pen, 1 x 60X &30X Jewelers Loupe, 1 x 9V battery, 1 x Leather Pouch Case, 1 x Testing Platform, 1 x User Manual.
【Accurate Detection】- Our Professional Jewelry Diamond Tester Pen features a sophisticated sensor for precise gemstone identification (Diamonds/Moissanite: 9+ lights + beeps; Jade: 5-6 lights; Crystal/Glass: 5-7 lights). (Jewelry-Only Detection – Not for metal/gold or gold testing kit use)
Jewelry Diamond Tester,200g/0.01g Mini Jewelry Scale,60X Mini LED Magnifying Diamonds Kit,Professional Diamond Selector for Novice and Expert,Thermal Conductivity Meter (Diamond Tester+Scale)
Hqdz-td
Dz-088
5.9055 x 1.5748 x 1.1811 inches
0.1984 pounds
Ratings for Hqdz-td (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ying-hao technology | - | ❌ | ❌ | ❌ |
Features
♦[Fast and safe ]:This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes.
♦[Simple to Use]:Simple to Use Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. reads weights of adiamond use 200g/0.01g Mini Jewelry Scale, To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses.
Top 21
Professional Diamond Moissanite Tester Combo Diamond Tester Moissanite Tester with Visual&Buzzer Alarm High Accuracy Diamond Moissanite Jewelry Test Tool Kit
DANOPLUS
KIB-083
1.65 x 0.87 x 6.81 inches
0.39 pounds
Ratings for DANOPLUS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KIBELAND | - | ✅ | ✅ | ✅ |
Features
✅【High Accuracy】 The Diamond&Moissanite Tester is designed to help you quickly determine diamond and moissanite from other fake stones
✅【User-Friendly】: Diamond Detector is easy to operate, hold the meter in 90 Degree position to insert to the surface of diamond, then Green light(diamond) or Blue light(moissanite) will appear on the indicator
Top 22
Diamond Tester Pen＋60X Mini LED Magnifying,High Accuracy Jewelry Diamond Tester Tool,Environmental Protection 9V Battery,Professional Diamond Selector for Novice&Expert,Thermal Conductivity Meter
Hqdz
HZZ9
6.2992 x 1.1811 x 0.7874 inches
0.4211 pounds
Ratings for Hqdz (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Hai-electronic | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
✔【Intuitive Design】Hqdz Diamond Tester Pen comes with LED lights and audio indication. During a test, if the stone tested is a diamond, the LED lights will light up as the stone passes each test conducted by the Diamond detector. Once our Diamond Tester Pen has completed all of its tests, the pen will make a beep sound as well as show a row of fully lite LED lights.
✔【Simple to Use】Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses.
Top 23
Diamond Tester,Jewelry Diamond Tester Pen+200g/0.01g Mini Jewelry Scale＋60X Mini LED Magnifying, Professional Diamond Selector for Novice and Expert,Thermal Conductivity Meter(Diamond Tester +)
Hqdz-td
TD-171
6.0 x 1.2 x 1.0 inches
Ratings for Hqdz-td (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ying-hao technology | - | ❌ | ❌ | ❌ |
Features
💎【Steps of Usage】Remove the cap from the testing pen>>Insert the battery we attached >> Turn on the diamond tester pen and wait until both the lambs OK >>Place the pointer vertically on the surface of the stone >>Observe the indicator lights and listen to the sound>> get the result
💎【FOR DIAMOND】For testing diamond(include real diamond and Moissanite), it will emits beeping-beeping-beeping in a low frequency, 1 time/second. Meanwhile lights ≥ 9 (Notice: the bigger the stone is, the more lights on)
Diamond Tester Pen, High Accuracy Jewelry Tester, Battery Included, Gemstone-Only Detection - No Metal/Gold Testing, for Novice and Expert Gemologists
Marvelity
Ratings for Marvelity (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| MarvelityDirect | - | ❌ | ❌ | ❌ |
Features
GEMSTONE-ONLY DETECTION: This diamond tester is EXCLUSIVELY for gemstone testing (diamond, moissanite, jade, crystal, glass). NEVER test metal, gold, silver, skin, water or any non-gem items—false beeps/lights are normal, not a product defect
MUST-FOLLOW OPERATION STEPS: Power on → Preheat 30s (critical step) → Calibrate to 4th mark → Touch back metal panel with bare hand → Probe gem at 90° perpendicular. Reset calibration before each test for accurate results, no professional skills needed
Top 25
GemOro UltraTester 3+ Diamond Tester | Test Diamond, Moissanite, White Sapphire Gemstone | Precision Tool with Expert Professional Reading & Accuracy
GemOro
0776
9.0 x 5.0 x 2.0 Inches
Ratings for GemOro (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Five Star Savings | 1,673 | ✅ | ✅ | ✅ |
| GemOro Official | - | ✅ | ✅ | ✅ |
Features
STONE IDENTIFICATION: This new enhanced testing technology is a breakthrough in the identification, detection, and separation of diamonds from other materials such as CZ, moissanite, and white sapphire. This technology has the capability to identify stones with low conductivity, allowing accurate detection and separation of diamonds from other materials. It evaluates stones using cutting-edge scanning techniques and advanced software analysis, ensuring a highly accurate test result.
LED STONE ILLUMINATION & DETECTION: This is a high-performance diamond tester with LED stone illumination and UV fluorescence detection. It uses a unique retractable probe tip that is designed for enhanced durability. The LED stone illumination will help you see the subtle nuances of the diamond, such as clarity, while the UV fluorescence detection allows you to detect any potential diamond treatments. This is the perfect tool for diamond grading, authentication, and identification.
Diamond Tester, High Accuracy Jewelry Diamond Tester Pen＋200g/0.01g Mini Jewelry Scale＋60X Mini LED Magnifier, Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter
Hqdz
H4-45
6.0 x 1.1 x 1.0 inches
Ratings for Hqdz (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Hai-electronic | - | ❌ | ❌ | ❌ |
Features
This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes.
Simple to Use Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. reads weights of adiamond use 200g/0.01g Mini Jewelry Scale, To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses.
Top 27
High Accuracy Diamond Tester Pen,Professional Jewelry Diamond Tester,Diamond Selector for Novice and Expert, Thermal Conductivity Meter-9V Battery Included(Diamond Tester)
Hqdz-td
Dz-088
5.9055 x 1.5748 x 1.1811 inches
0.1984 pounds
Ratings for Hqdz-td (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ying-hao technology | - | ❌ | ❌ | ❌ |
Features
♦[Intuitive Design]:Our diamond tester features an LCD display and LED indicator make it easy to read your precise testing results.No need for a professional - the Hqdz-td Diamond Tester Pen is easy to operate. Just turn it on, lightly press the tip to the gemstone, and wait for the beep to know if it's real or fake.
♦[If it's Real Diamond]:The professional Diamond Tester will lighted up over 9 and emits audible sounds. No reaction means the stone is a fake crystal or simulant like cubic zirconium (CZ).
Diamond Tester Pen Kit, Professional Gemstone Tester with Jewelers Loupe, Gemstone Claw, Stainless Steel Tweezers and Silver Polishing Cloth for Diamond, Crystal, Jade, Ruby, Sapphire Testing
WUCID
Diamond Tester 003
7.2835 x 2.1654 x 1.378 inches
0.35 pounds
Ratings for WUCID (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WUCID Online | - | ❌ | ❌ | ❌ |
Features
1. Complete Diamond Testing Kit This diamond tester kit includes a diamond tester pen, jewelers loupe, gemstone claw, stainless steel tweezers, silver polishing cloth and storage pouch. A practical jewelry testing set for beginners, collectors and jewelry professionals.
2. Professional Gemstone Tester Designed to help identify diamonds and a variety of gemstones by thermal conductivity. Suitable for testing diamonds, crystals, jade, rubies, sapphires, emeralds, agate and other gemstones in different sizes.
Top 29
Diamond Tester Pen,Jewelry Diamond Tester Pen+30X 60X Mini LED Magnifying Jewelry Eye Loupe Jewelry Distinguish Tool Professional Diamond Selector for Novice and Expert
Hqdz
H-098
6.0 x 1.8 x 1.2 inches
0.1764 pounds
Ratings for Hqdz (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Hai-electronic | - | ❌ | ❌ | ❌ |
Features
☝【Clear screen design】These high accuracy diamond testers are designed with a clear screen, so you can get the useful data quickly; The item you are testing will be a true diamond when the data is above 9, and a true emerald crystal agate when the data is 7, saving your time to recognize.
☝【TWO-HANDS TEST】 It is essential to perform all tests using two hands - one to hold the diamond and the other to operate the diamond tester. The hand that holds the diamond tester must make contact with the electricity conductive panel on the back of the unit. Testing the diamond with just one hand will result in inaccurate readings.
Top 30
High Accuracy Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor – Fast 0.5s Detection,Diamond Tester, Professional Jewelers' Gemstone Detector (Diamond Tester Pen)
UVER
DT-89-UR-CT
1.8 x 0.8 x 7.2 inches
Ratings for UVER (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| UVER | - | ❌ | ❌ | ❌ |
Features
Identify genuine diamonds instantly. Accurately distinguish authentic diamonds from simulants like cubic zirconia, glass, crystal, or white sapphire using advanced thermal conductivity. Perfect for screening inherited collections or verifying finds at flea markets and pawn shops, Includes a Standard 9V Battery (same type available in the U.S., easily replaceable) for immediate testing.
365NM UV & MOISSANITE SCREENING : The integrated 365nm UV light reveals fluorescence—an important clue for authenticity. Since Moissanite and fakes show unique color reactions (unlike diamonds), this is a critical second layer of verification. Note: Thermal testing alone may be inconclusive for Moissanite; always use the UV light for a combined assessment.
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Top 10 Diamond Testers Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- Mollo
- UVER
- TEKCOPLUS
- Valkynos
- Hqdz-td
- HMKIS
- Hqdz
- Generic
- HMJOY
- Siziviki
Specific Diamond Testers Guides
For more personalized Diamond Testers guides to match your different needs, check out the following pages,
Featured Brands
Top 9 Diamond Testers Sellers: CPR Seller Rank List
CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.
- 1. Five Star Savings : 33,812 Yearly Feedback , Avg. Ratings 4.9
- 2. Tekcoplus : 1,363 Yearly Feedback , Avg. Ratings 4.9
- 3. MarvelityDirect : 558 Yearly Feedback , Avg. Ratings 4.9
- 4. Siziviki : 538 Yearly Feedback , Avg. Ratings 4.9
- 5. KIBELAND : 478 Yearly Feedback , Avg. Ratings 4.9
- 6. Molo Electronics : 431 Yearly Feedback , Avg. Ratings 4.7
- 7. UVER : 383 Yearly Feedback , Avg. Ratings 4.6
- 8. GemOro Official : 360 Yearly Feedback , Avg. Ratings 4.8
- 9. Valkynos Industries : 318 Yearly Feedback , Avg. Ratings 4.8
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | Five Star Savings | 33,812 | 4.9 |
| 🥈 | Tekcoplus | 1,363 | 4.9 |
| 🥉 | MarvelityDirect | 558 | 4.9 |
| 4 | Siziviki | 538 | 4.9 |
| 5 | KIBELAND | 478 | 4.9 |
| 6 | Molo Electronics | 431 | 4.7 |
| 7 | UVER | 383 | 4.6 |
| 8 | GemOro Official | 360 | 4.8 |
| 9 | Valkynos Industries | 318 | 4.8 |
[Get] Diamond Testers Deals (✅Exclusively for Prime)
What does "Amazon Fulfilled" Mean?
Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.
When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.
What does "Prime" Mean?
"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.
Prime members also have access to other benefits, including 2-Day Shipping, Exclusive Member Deals, Prime Video, Buy With Prime, Amazon Music, Prime Gaming, and more.
Shop Prime Diamond Testers Deals
What does "Free Shipping" Mean?
"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.
Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.
Why Should You Trust Us?
Now hundreds and thousands of Beading & Jewelry Making supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best Diamond Testers to buy for new October 2026?
CherryPicks’s Methodology for Evaluating Diamond Testers
We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Beading & Jewelry Making items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.
We collected and analyzed 209 of Diamond Testers reviews based on our selection criteria. It helped us shortlist the top qualified and rated Diamond Testers for Beading & Jewelry Making, We found that most customers choose Diamond Testers with an average price of $45.89, and the top brands are Generic, TEKCOPLUS, DANOPLUS And UVER.
Then our expert-level editors reviewed all those quality items and selected the top 30 Diamond Testers for you, We have researched hundreds of sellers and picked the top sellers for Beading & Jewelry Making, including Amazon Resale, Five Star Savings, Tekcoplus, MarvelityDirect, Siziviki, KIBELAND, Molo Electronics, UVER, GemOro Official And Valkynos Industries. The Diamond Tester High Accuracy Diamond Tester Pen... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 87 consumers with an average rating of 3.9.
We've helped a lot of satisfied users get the right Arts, Crafts & Sewing product based on their needs, and save lots of time for them to pick Diamond Testers to buy.
Donald K. Bradley, Dokey for short has over 10 years of experience in the art sector teaching and setting standards for others in his local art community. He also doubles as a writer and using these two skills, he would be guiding you on the best tools for the job.