Best Presidium Diamond Testers (Sep. 2026) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

Presidium Gem Tester (PGT II) Complete Unit and Replacement Probe Pen PS2-2 f...

9.8
CPR Score
Top 2

Presidium Digital GEM Refractometer (PRIM II) - Measures RI Value for Diamond...

9.8
CPR Score
Top 3

Presidium Electronic Gemstone Gauge (PEGG) | Digital Jewelry and Diamond Meas...

9.7
CPR Score
Tips

Our Presidium Diamond Testers Listing is based on our detailed analysis of 25 Presidium Diamond Testers reviews and over 2,771 customer reviews. We have compiled the top 25 Best Presidium Diamond Testers you might be interested in and ratings based on product features.

* CherryPicks.Reviews is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best Presidium Diamond Testers Rated by CherryPicks

Market Overview
Presidium Diamond Testers Reviewed
  • Reviews Analyzed: 2,771 Items
  • CPR Avg. Rating: 8.7 / 10
25 Products Evaluated
  • Highest Price: $2,166.99
  • Lowest Price: $53.85
  • Avg. Price: $345.28
Price Disclaimer

Top 25 Presidium Diamond Testers on Amazon (Verified You can Buy)

Top 1

Presidium Gem Tester (PGT II) Complete Unit and Replacement Probe Pen PS2-2 for PGT II and PDT II Bundle

Presidium
PGT II

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CroVentures -

Features

PGT II COMPLETE UNIT - INCLUDED ASSISTED THERMAL CALIBRATION | Now easily self calibrate your device to your testing environment.
REPLACEMENT PROBE PEN PRODUCT COMPATIBILITY: For use with Presidium Gem Tester II (PGT II) and Presidium Duo Tester II (PDT II) only.
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Top 2

Presidium Digital GEM Refractometer (PRIM II) - Measures RI Value for Diamond & Moissanite

Presidium

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
greatstuffromus -
Best Jewelry Supply -
Top 3

Presidium Electronic Gemstone Gauge (PEGG) | Digital Jewelry and Diamond Measuring Tool for Accurate Gemstone Dimensions and Carat Weight Estimation, Touch Button Zeroing, High-Precision Display

Presidium

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
greatstuffromus -

Features

INDUSTRY-LEADING PRECISION | Measures gemstone dimensions with up to 1/100 mm accuracy, ensuring precise sizing of gemstones.
DIRECT CARAT CONVERSION | Instantly converts gemstone measurements to estimated carat weight for round brilliant-cut diamonds, saving time and improving accuracy for jewelers and gem enthusiasts.
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Top 4

Presidium Diamond Mate A (PDMT-A) Diamond Tester | Professional Handheld Diamond Authenticity Tester | Thermal Conductivity Diamond & Simulant Testing Tool with Metal Alert & Low Battery Indicator

Presidium
PDMT-A
8.0 x 2.4 x 3.4 inches

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CroVentures -
Jeweler's Supermarket 4,027

Features

INSTANT DIAMOND AUTHENTICITY TESTING – Quickly verify real diamonds using advanced thermal conductivity technology. Designed to distinguish diamonds from common simulants with fast, reliable results.
PROFESSIONAL HANDHELD DIAMOND TESTER | Compact, lightweight, and easy to use, making it ideal for jewelers, pawnbrokers, gemologists, appraisers, and diamond buyers.
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PRESIDIUM DIAMONDMATE-C ELECTRONIC DIAMOND TESTER

Presidium
PDMT-C
3.4 x 2.4 x 7.5 Inches

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
FindingKing 589
Jeweler's Supermarket 4,027
CroVentures -
REFURB 360 -
Five Star Savings 1,676
Top 6

Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants

Presidium
PMuT III
3.4 x 2.4 x 8.0 inches
0.2138 Pounds

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CroVentures -
Stuller, Inc. -
Jeweler's Supermarket 4,027
Kassoy LLc -

Features

IMPORTANT TO NOTE: This product needs to be calibrated prior to use. If you experience issues with calibration, please reach out to the seller for assistance prior to returning the item.
EASY TO USE DESIGN: Ergonomic handheld design with a rubberized anti-slip grip for easy handling. Light and portable with a convenient carrying case.
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Top 7

Presidium Duo Tester PDT Diamond Gemstone Tester

Presidium
PDT-S7
1.55 pounds

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
greatstuffromus -
Jeweler's Supermarket 4,027
CroVentures -

Features

Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone
Industrys thinnest probe tip (0.6mm) for testing gemstones as small as 0.02ct
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Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

Presidium
‎PGT-II
7.8 x 4.5 x 3.8 inches

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CroVentures -
FindingKing 589
Jeweler's Supermarket 4,027
Five Star Savings 1,676

Features

INCLUDED ASSISTED THERMAL CALIBRATION | Now easily self calibrate your device to your testing environment
INDUSTRIES MOST TRUSTED | Gemstone tester redesigned to be more compact, sturdy and portable
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Top 9

Presidium OTi Diamond Detector with Optical-Thermal Verification Method. Singaporean Brand

Generic
TTIA00097
3.0 x 4.0 x 2.0 inches
1.5432 Pounds

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LUX GOLDSMITH JEWELRY EQUIPMENT Store -

Features

Dual-Method Diamond Verification: Uniquely combines optical and thermal testing in a single probe for instant, on-the-spot identification of both natural and lab-grown diamonds, providing double the certainty.
Detect All Major Simulants: Effectively distinguishes natural diamonds from colorless synthetics (CVD & HPHT), Moissanite, and common imitations like Cubic Zirconia (CZ), glass, and sapphire.
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Top 10

Presidium Adamas Diamond and Moissanite Tester Authenticating Diamonds

Presidium
ADAMAS
7.0 x 4.0 x 4.0 inches
0.0006 pounds

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
FindingKing 589
CroVentures -
Jeweler's Supermarket 4,027
Amazon Resale -

Features

INDUSTRY’S THINNEST TIP: Detects colorless diamonds, moissanites, simulants instantly with metal alert. Accurate testing on colorless diamonds as small as 0.02 carats and diamond melees as small as 0.01 carats with micro probe purchased separately
DYNAMIC MICRO LED DISPLAY: Bright LED display provides clear and precise results. Automatic power off after 2 minutes of inactivity.
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Top 11

Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones

Presidium
PGI

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CroVentures -
FindingKing 589

Features

INDUSTRIES MOST TRUSTED | The only handheld tester specifically for colored gemstones; Quick results in less than 6 seconds.
THINNEST RETRACTABLE PROBE TIP | Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone, for enhanced accuracy.
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Top 12

Presidium Professional Gemstone Measurement & Verification Instrument, Diamond Tester & Gem Identification Tool

Generic
PGCG
5.1181 x 4.7244 x 4.7244 inches

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LUX GOLDSMITH JEWELRY EQUIPMENT Store -

Features

All-in-One Gem Analysis Tool: Measures gemstone dimensions with 0.01mm accuracy, instantly converts to estimated carat weight for 9 popular cuts, and aids in identifying 74 gem types via specific gravity matching—all without removing stones from settings.
PC Connectivity & Professional Software: Includes USB connection and advanced software for easy data transfer, printing, and access to an extensive database of SG, RI, and hardness values for 133 common gemstones.
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Top 13

Presidium PDG Digital Gem Tester, Diamond & Moissanite Verifier. Fast Accurate Results

Generic
PDG

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LUX GOLDSMITH JEWELRY EQUIPMENT Store -

Features

Measure Mounted Stones Instantly: Specially designed to measure gemstones directly in their settings, eliminating the risk and cost of stone removal.
Direct Millimeter-to-Carat Conversion: Features a unique dual scale that instantly shows the approximate carat weight for round brilliant diamonds (up to 29 carats) alongside millimeter measurements.
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Top 14

Presidium Gem Indicator (PGI) - Handheld Tester

Presidium
PGI

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
greatstuffromus -
Top 15

Presidium Adamas Diamond/Moissanite Tester Package USB Charger and Optional Replacement Tip

Presidium
7.0 x 4.0 x 4.0 inches
1.0 Pounds

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Jeweler's Supermarket 4,027

Features

Identifies diamonds, moissanites, simulants and metals instantly
Accurate testing on diamonds as small as 0.02ct and diamond melee as small as 0.01ct (Micro Tip Required)
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Top 16

Presidium Synthetic Diamond Screener II (SDS II) | Portable Desktop Diamond Tester for Lab-Grown vs Natural Diamonds | Detects CVD & HPHT | Tests Melee Stones from 0.02 Carat | USB & Battery Powered

Presidium
7.8 x 4.6 x 3.9 inches
1.39 Pounds

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CroVentures -
FindingKing 589

Features

ADVANCED DIAMOND SCREENING TECHNOLOGY | Uses deep UV absorption technology to differentiate Type IIa lab-grown diamonds (CVD/HPHT) from natural Type Ia diamonds with high accuracy and reliability.
FAST & INSTANT RESULTS | Get clear results within 2 seconds using dual color-coded indicators—blue for natural diamonds and red for suspected lab-grown Type IIa diamonds.
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Top 17

Presidium PRIM II Digital Refractometer, Measurement Range 1.000 to 3.000 RI

Generic
PRIM II

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LUX GOLDSMITH JEWELRY EQUIPMENT Store -

Features

Digital Refractive Index Measurement: Instantly displays precise R.I. readings on a digital screen with a wide measurement range from 1.000 to 3.000, eliminating the need for immersion fluids.
Built-In Database of 55 Gemstones: Quickly identify diamonds, moissanite, and colored gemstones by comparing your measurements against the integrated gemstone library.
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Top 18

Presidium SDS II Synthetic Diamond Detector, Identifies CVD & HPHT Lab-Grown Diamonds

Generic
SDS II
1.0 Pounds

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LUX GOLDSMITH JEWELRY EQUIPMENT Store -

Features

Instant Screening for Type IIa Diamonds: Specifically designed to quickly identify colorless Type IIa (CVD/HPHT) lab-grown diamonds and distinguish them from natural Type Ia diamonds in just 2 seconds.
Dual LED Visual Indicators: Features clear blue and red LED lights for immediate, unambiguous results—blue for natural Type Ia diamonds and red for potentially synthetic Type IIa diamonds.
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Top 19

SAM by Presidium | Advanced Diamond and Moissanite Tester with Thermoelectrical Probe | Detects Low Conductivity Moissanite | 0.01–10 Carat Diamond Testing Tool

Presidium
SAM
6.69 x 1.2 x 1.1 inches
0.1213 Pounds

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CroVentures -
Jeweler's Supermarket 4,027

Features

IDENTIFIES DIAMONDS VS. WIDE RANGE OF MOISSANITES | Accurately distinguishes natural diamonds from a broader range of moissanites, including the latest low electrical conductivity moissanite produced in multiple countries plus other common diamond simulants.
HIGHLY SENSITIVE THERMOELECTRICAL PROBE | Equipped with a precision thermoelectrical probe tip engineered for higher resolution testing, delivering reliable gemstone identification with enhanced sensitivity and accuracy.
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Top 20

Presidium Replacement Probe Pen PS2-2 for Presidium Gem Tester II (PGT II) and Duo Tester II (PDT II)

Presidium
‎PGT-II
7.09 x 4.53 x 0.94 inches
0.0006 pounds

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon Resale -
CroVentures -

Features

PRODUCT COMPATIBILITY: For use with Presidium Gem Tester II (PGT II) and Presidium Duo Tester II (PDT II) only.
INDUSTRIES MOST TRUSTED: Titanium Probe Pen for replacement if your probe pen is missing or damaged.
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Top 21

Presidium DuoTester PDT II Professional Diamond/Moissanite Tester

Generic
Duo Tester II

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LUX GOLDSMITH JEWELRY EQUIPMENT Store -

Features

Ultra-Fine 0.6mm Needle & ATC: Features a revolutionary thermoelectric micro-tip for testing stones from 0.02 carats, backed by Automatic Thermal Calibration (ATC) for consistent accuracy in varying room temperatures.
Ultra-Fine 0.6mm Needle & ATC: Features a revolutionary thermoelectric micro-tip for testing stones from 0.02 carats, backed by Automatic Thermal Calibration (ATC) for consistent accuracy in varying room temperatures.
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Top 22

Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

Presidium
PGT-II
4.5 x 3.8 x 7.8 Inches
1.1905 Pounds

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
FindingKing 589

Features

NOTE: The calibration may be affected during shipping. If you have issues, reach out to the seller.
INDUSTRIES MOST TRUSTED gemstone tester redesigned to be more compact, sturdy and portable.
Show More
Top 23

Presidium Multi Tester PMUT III - Diamond, Moissanite & Simulant Testing Pen for Jewelry Identification

Generic
PMUT III
4.3307 x 4.7244 x 4.7244 inches

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LUX GOLDSMITH JEWELRY EQUIPMENT Store -

Features

Dual-Property Accuracy: Uniquely identifies and separates colorless diamonds, moissanites, and common simulants by analyzing both thermal and electrical conductivity for reliable verification.
Ultra-Precision for Micro-Stones: Equipped with the industry's thinnest 0.6mm retractable probe, accurately testing diamonds as small as 0.02 carats with constant pressure control.
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Top 24

PRESIDIUM ELECTRONIC GEMSTONE DIAMOND GEM GAUGE PEGG by Presidium

Presidium

Ratings for Presidium (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
greatstuffromus -
Top 25

Presidium Gem Tester II - Diamond & Moissanite Tester with 0.6mm Probe for 16 Gemstone Identification

Generic
PGT II
4.3307 x 4.7244 x 4.7244 inches

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LUX GOLDSMITH JEWELRY EQUIPMENT Store -

Features

Dual-Function Identification: Instantly identifies diamonds and moissanites, and simultaneously separates up to 16 common colored gemstones based on thermal conductivity.
Ultimate Precision for Micro-Stones: Equipped with the world's thinnest 0.6mm probe, capable of testing polished or unpolished stones as small as 0.02 carats, including most coated gems.
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Top 10 Presidium Diamond Testers - Verified to Buy (September 2026)

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Top 7 Presidium 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.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 FindingKing 75,703 4.8
🥈 Five Star Savings 33,789 4.9
🥉 Jeweler's Supermarket 16,070 4.9
4 greatstuffromus 2,786 4.7
5 REFURB 360 2,715 4.8
6 CroVentures 743 4.9
7 Stuller, Inc. 36 4.3
View or download top Presidium Diamond Testers seller & rating report
FindingKing [75703] Five Star Savings [33789] Jeweler's Supermarket [16070] greatstuffromus [2786] REFURB 360 [2715] CroVentures [743] Stuller, Inc. [36] FindingKing 57% Five Star Savings 26% Jeweler's Supermarket 12% greatstuffromus 2% REFURB 360 2% CroVentures 1% Stuller, Inc. 0%

[Get] Presidium Diamond Testers Deals (✅Exclusively for Prime)

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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.

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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 Presidium Diamond Testers to buy for new September 2026?

CherryPicks’s Methodology for Evaluating Presidium 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 25 of Presidium Diamond Testers reviews based on our selection criteria. It helped us shortlist the top qualified and rated Presidium Diamond Testers for Beading & Jewelry Making, We found that most customers choose Presidium Diamond Testers with an average price of $345.28, and the top brands are Generic

Then our expert-level editors reviewed all those quality items and selected the top 25 Presidium Diamond Testers for you, We have researched hundreds of sellers and picked the top sellers for Beading & Jewelry Making, including Amazon Resale, FindingKing, Five Star Savings, Jeweler's Supermarket, greatstuffromus, REFURB 360, CroVentures And Stuller, Inc.. The Presidium Gem Tester (PGT II) Complete Unit and... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 0 consumers with an average rating of 0.0.

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 Presidium Diamond Testers to buy.


Written By Lola Skinner

Fell in love with fashion design at a young age while watching her mom make beautiful pieces, she has grown to become a good designer and is now sharing her knowledge with us at CherryPicksReviews. She will be providing you guide, informative articles, and product reviews in the Arts, Crafts, and Sewing niche.