Top 30 Rock Tumbler Grit Refill Kits on Amazon (Verified You can Buy)
Top 1
Best for starter
National Geographic Rock Tumbler Refill Kit - 1 Lb. Mix of Genuine Rough Agate Rocks for Tumbling - Rock Tumbler Supplies Include Rock Tumbler Grit and Jewelry Accessories, Raw Agate
Blue Marble
NGAGATEREFILL
3.0 x 3.0 x 8.0 Inches
1.32 pounds
- Original Language: English
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
AGATES FROM AROUND THE WORLD - 1 lb. of rough agate rocks are sourced from around the world. Colors and sizes will vary between refill kits.
FOUR GRADES OF GRIT - Coarse, Medium, Fine, Polish. Transform your raw stones from rough rocks to dazzling gemstones! This refill kit also works with all rock tumblers.
Top 2
Rock Tumbler Grit Kit, 4LBS Polish Refill with Ceramic Tumbling Media - Polish up to 25 lbs of Rocks, Professional 4-Steps Polishing Grit Set for All Rock Tumblers
AtoRock
16.02 x 3.17 x 4.17 Inches
4.0 pounds
Ratings for AtoRock (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| DK. LLC | - | ❌ | ❌ | ❌ |
| AtoRock Official Store - 1-Year Warranty | - | ❌ | ❌ | ❌ |
Features
Premium Grit Achieve 80% Gloss: The rock tumbler grit set is crafted from premium materials and scientifically formulated for each polishing stage, designed to deliver consistent and outstanding results. With just 3 simple steps--add the rock polishing grit, start the tumbler, and wait for the results--you'll effortlessly transform rough stones into smooth surfaces with up to 80% gloss. Suitable for stones, sea glass, and metals.
Ultimate Tumbling Set - Everything You Need in One Box: The polishing grit kit includes 1 lb of 60-grit coarse silicon carbide, 1 lb of 150-grit medium silicon carbide, 0.5 lb of 600-grit fine silicon carbide, 0.5 lb of 1200-grit aluminum oxide polishing powder, 1 lb of ceramic tumbling media and 2 measuring spoons.
NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit and Jewelry Accessories
Blue Marble
NGGEMREFILLMEGA
5.374 x 5.315 x 5.437 inches
2.9983 pounds
- Original Language, Unknown: English
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
Features
GEMSTONES OF NINE VARIETIES: Tiger’s Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Black Jasper. (3lb in total)
FOUR GRADES OF GRIT: Coarse, Medium, Fine, Polish. Transform your stones from rough rocks to dazzling gemstones!
Top 4
NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 1 Lb. Jasper Rocks for Tumbling - 8 Varieties including Mookaite and Kabamba - Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories
Blue Marble
NGJASPERREFILL
3.0 x 3.0 x 8.0 Inches
1.0 pounds
- Unknown: English
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
JASPER OF EIGHT VARIETIES: Mookaite, Kabamba, Zebra, Picture, Red, Dalmatian, Polychrome, Yellow. (1 lb. total)
FOUR GRADES OF GRIT: Coarse, Medium, Fine, Polish. Transform your stones from rough rocks to dazzling gemstones!
Top 5
Best for starter
NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1 Lb. Madagascar Rocks for Tumbling with Rose Quartz, Red Jasper, Indigo Gabbro & More - Tumbler Supplies, Rock Polishing Grit and Jewelry Accessories
Blue Marble
NGMADREFILL
3.0 x 3.0 x 8.0 Inches
1.32 pounds
- Original Language: English
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
REAL GEMSTONES FROM MADAGASCAR - 1 lb. of raw rocks includes rose quartz, labradorite, red jasper, yellow jasper, indigo gabbro, and polychrome jasper. Quantities of each gemstone may vary.
FOUR GRADES OF GRIT - Coarse, medium, fine, polish. Transform your raw stones from rough rocks to dazzling gemstones! This refill kit also works with all rock polishers.
Top 6
Best for starter
KomeStone Rock Tumbler Grit Kit - 4LB 4-Step Polish Refill with Ceramic Tumbling Media, Polish Up to 25 lbs of Rocks, Compatible with All Rock Tumblers, from the Rock Tumbler Experts
KomeStone
KS0720RT17
2.4 x 2.4 x 3.5 inches
4.7399 Pounds
Ratings for KomeStone (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KS 2026 | - | ❌ | ❌ | ❌ |
Features
Complete 4-Step Rock Tumbler Grit Kit - Everything In One Box: Includes 1 lb 60-grit coarse silicon carbide (Step 1: removes surface scratches and shapes the stone), 1 lb 150-grit medium silicon carbide (Step 2: smooths rough surfaces), 1/2 lb 600-grit fine silicon carbide (Step 3: creates a pre-polish sheen), 1/2 lb 1200-grit aluminum oxide (Step 4: delivers a brilliant, glass-like final polish), and 1 lb ceramic tumbling media for barrel balance.
Polish Up To 25 Lbs Of Rocks Per Kit - High Efficiency: Each 4LB kit provides enough grit and media to process up to 25 lbs of stones across multiple batches. Cost-effective for continuous projects, large-capacity tumblers, and serious collectors who need reliable, repeatable results without frequent restocking.
NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 5 lb. Mix of Rocks for Tumbling and Rough Gemstones - Rock Tumbler Supplies include Rock Tumbler Grit and Polish Refill, and Unpolished Rocks
Blue Marble
NGWORLDREFILL
6.9 x 6.1 x 5.9 Inches
6.51 Pounds
- Original Language: English
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| National Geographic Toys | 2,794 | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
Features
ENORMOUS VARIETY - This rock tumbler refill kit has 5 pounds of unpolished rocks and gemstones consisting of a 1-pound gemstone mix, 1-pound agate mix, 1-pound Madagascar mix, 1-pound jasper mix, and 1-pound petrified wood mix
ROCK POLISHING GRIT – There are 20 total rock tumbler grit packets in the kit, enough for five complete tumbling cycles with any rock tumbler
Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings - Turn Rough Rocks into Beautiful Gems : Great Science & STEM Gift for Kids All Ages : Geology Toy
Dan&Darci
Rock Tumbler
12.7 x 10.0 x 5.7 inches
Ratings for Dan&Darci (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Surreal Brands | 3,173 | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Turn rough rocks into polished gems: Discover and learn the fun process of rock tumbling with the Advanced Rock Tumbler. Pour in the rough stones and grit and let the machine do its job!
Complete kit: Includes: rock tumbler machine, low-noise barrel (1 lb. capacity), 4 grit packets, 1/2 lb. assorted rough rocks, mesh strainer, jewelry fasteners, gem storage bag, and an illustrated easy-to-follow instruction and learning guide booklet.
NATIONAL GEOGRAPHIC Rock Tumbler Kit - 3 Lb. Extra Large Capacity Barrel with 3-Speed Motor & 9-Day Timer, Kit Includes Rocks for Tumbling and Rock Polisher Grit, Rock Tumbler for Adults and Kids
Blue Marble
NGTUMBLER3LB
12.7559 x 10.315 x 6.6929 inches
8.1571 pounds
- Unknown: English
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| National Geographic Toys | 2,794 | ✅ | ✅ | ✅ |
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This professional rock polisher makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.
A TUMBLER THAT'S MADE TO LAST - The durable motor has time and speed control settings so you can set it, and forget it. An improved, leak-proof barrel features a stainless-steel lid is 75% quieter overall than plastic tumbler barrels.
Top 10
KomeStone Rock Tumbler Grit and Polish Refill Kit - 6 Pounds, Value Pack, Ideal for Up to 40 lbs. of Rocks, 4-Step Tumbling Media, Compatible with Any Rock Polisher, Better Results
KomeStone
4-Step Complete Kit (6LB)
3.2 x 3.2 x 5.2 Inches
6.0 Pounds
Ratings for KomeStone (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KS 2026 | - | ❌ | ❌ | ❌ |
Features
Complete 4-Step Kit: Includes 6 lbs of polishing grits—4 bottles with Silicon Carbide for coarse, medium, and pre-polish steps, and Aluminum Oxide for final polish.
Polish Up to 40 lbs: Ideal for tumbling up to 40 lbs of rocks, making it suitable for large projects or multiple batches.
KoolStone Large 2.5LB Professional Rock Tumbler Kit, 3-Speed Motor & 9-Day Timer, Rubber Barrel, Quiet Rotary Stone Polisher with 6 Belts, Rough Gemstones, 4 Polishing Grits, for Adults Kids
KoolStone
KS20220422
11.22 x 9.02 x 5.71 Inches
6.2611 pounds
Ratings for KoolStone (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KoolStone--1 Year Replacement Warranty | - | ✅ | ✅ | ✅ |
| Anrapley US (1 Year Guarantee) | - | ✅ | ✅ | ✅ |
| DK. LLC | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Belts are consumables, so we'd like to offer extra 5 belts for spare use. 𝐏𝐥𝐞𝐚𝐬𝐞 𝐚𝐝𝐝 𝐭𝐡𝐢𝐬 𝐥𝐢𝐬𝐭𝐢𝐧𝐠 𝐭𝐨 𝐲𝐨𝐮𝐫 𝐰𝐢𝐬𝐡 𝐥𝐢𝐬𝐭 𝐚𝐧𝐝 𝐭𝐡𝐞𝐧 𝐫𝐞𝐚𝐜𝐡 𝐨𝐮𝐭 𝐮𝐬 𝐭𝐨 𝐠𝐞𝐭 𝐢𝐭 (𝐰𝐨𝐫𝐭𝐡 𝟏𝟐𝐔𝐒𝐃).
2 Years Warranty - Special Bonus Just for You! The warranty covers accessories replacement, techical support, 𝟐𝟒/𝟕 𝐜𝐥𝐚𝐢𝐦 𝐡𝐨𝐭𝐥𝐢𝐧𝐞 and so on. 𝐌𝐚𝐤𝐞 𝐲𝐨𝐮𝐫 𝐦𝐨𝐧𝐞𝐲 𝐰𝐨𝐫𝐭𝐡 𝐞𝐯𝐞𝐫𝐲 𝐩𝐞𝐧𝐧𝐲.
Rockhound's 1st Choice Rock Tumbler Refill Grit Kit Polishes up to 3 Lbs of Rocks-Use in Thumlers,Lortone,Dr.Cool, Nat'l Geo & Chicago
Rockhound's First Choice
GK
Ratings for Rockhound's First Choice (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Rockhound's1stChoice | - | ❌ | ❌ | ❌ |
Features
Made in the usa - pre measured for precise use in all 3 lb capacity rock tumblers
A great choice for all smaller or beginner "kidz" rock tumblers 1/2 lb capacity & larger (the smaller the tumbler the more charges you get!)
Top 13
Best for MJR Tumblers
MJR Tumblers Refill Grit Kit Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Results. for 35lb Rock Tumblers with Silicon Carbide and Plastic Pellets
MJR Tumblers
9.0 pounds
Ratings for MJR Tumblers (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| MJR Tumblers | - | ❌ | ❌ | ❌ |
Features
Extreme Polish! Every rock tumbling kit from MJR Tumblers comes with our Exclusive 12,000 Grit Sub Micron Extreme Aluminum Oxide Polish! No other polish even comes close to our results. If you want the best, MJR Tumblers 12,000 Grit Aluminum Oxide Extreme Polish is what you need!
MJR Tumblers is a Disabled and Veteran Owned Company!
Top 14
Best for MJR Tumblers
MJR Tumblers Refill Grit Kit Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Polish for Unparalleled Results. for 50lb Rock Tumblers with Silicon Carbide and Plastic Pellets
MJR Tumblers
12.5 pounds
Ratings for MJR Tumblers (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| MJR Tumblers | - | ❌ | ❌ | ❌ |
Features
Extreme Polish! Every rock tumbling kit from MJR Tumblers comes with our Exclusive 12,000 Grit Sub Micron Extreme Aluminum Oxide Polish! No other polish even comes close to our results. If you want the best, MJR Tumblers 12,000 Grit Aluminum Oxide Extreme Polish is what you need!
MJR Tumblers is a Disabled and Veteran Owned Company!
NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks & Crystals for Kids (Amazon Exclusive)
Blue Marble
NGTUMBLER2
10.9843 x 5.1969 x 12.0 inches
4.1888 pounds
- Subtitled: German
- Unknown: English
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
Features
CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This starter rock tumbler makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.
A TUMBLER THAT'S MADE TO LAST - The durable motor allows you to tumble multiple batches of rocks. An improved, leak-proof barrel is lined with rubber for quieter operation while tumbling on the sturdy tumbler base.
Top 16
KoolStone Brushless Motor Rock Tumbler, Large 2.5LB Capacity with 4LB Rock Tumbler Grit and Polish Refill Media Kit
KoolStone
Ratings for KoolStone (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| DK. LLC | - | ❌ | ❌ | ❌ |
Features
CUTTING-EDGE BRUSHLESS MOTOR -- With a robust brushless motor, this rock tumbler delivers lightning-fast and highly-effective tumbling action that leaves your gems and rocks polished to perfection. In addition, what makes us proud is that we are currently the FIRST and ONLY brushless motor rock tumbler available on the market.
2.5LB LARGE CAPACITY & 75% QUIETER -- An updated features is that KoolStone Rock Tumbler has a large 2.5LB capacity. Which allows to tumbler more rocks each time. Another improvement is the quieter barrel. Rubber material which has 75% quieter than most plastic barrel.
KomeStone K2 Elite Professional Rock Tumbler Kit, Ultra Quiet & Cutting Edge Brushless Motor Rock Polisher for Adults & Rock Collector, Noise-Reduction, Extra Large 3 Lbs Barrel, STEM Gift for All Age
KomeStone
CA-KS0515RT46
6.8 x 7.9 x 7.9 inches
8.598 pounds
Ratings for KomeStone (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KomeStone Direct | - | ❌ | ❌ | ❌ |
| KS 2026 | - | ❌ | ❌ | ❌ |
Features
𝟗𝟎-𝐃𝐚𝐲 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 𝐆𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞 & 𝟏-𝐘𝐞𝐚𝐫 𝐖𝐚𝐫𝐫𝐚𝐧𝐭𝐲: Enjoy peace of mind with our extended 90-day refund guarantee and 1-year warranty. If you miss Amazon's 30-day return window, simply contact our 𝐔𝐒-𝐛𝐚𝐬𝐞𝐝 𝐜𝐮𝐬𝐭𝐨𝐦𝐞𝐫 𝐬𝐞𝐫𝐯𝐢𝐜𝐞 team for 𝐡𝐚𝐬𝐬𝐥𝐞-𝐟𝐫𝐞𝐞 𝐫𝐞𝐩𝐥𝐚𝐜𝐞𝐦𝐞𝐧𝐭 𝐨𝐫 𝐫𝐞𝐟𝐮𝐧𝐝 𝐚𝐬𝐬𝐢𝐬𝐭𝐚𝐧𝐜𝐞. We offer 𝟐𝟒/𝟕 𝐜𝐥𝐚𝐢𝐦 𝐬𝐮𝐩𝐩𝐨𝐫𝐭 to ensure your complete satisfaction.
DIVE INTO THE FUN ROCK TUMBLING: KomeStone rock tumbler is for turning rough raw rocks into smooth gemstones. You’ll be excited to see the rocks change with each cycle—a great lesson in patience for kids or inspiration for jewelry-making moms.
Top 18
KoolStone C1 Rock Tumbler, Large 2.5LB Capacity with 4LB Rock Tumbler Grit and Polish Refill Media Kit
KoolStone
Ratings for KoolStone (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| DK. LLC | - | ❌ | ❌ | ❌ |
Features
KoolStone C1 Series – Trusted by Beginners, Backed by Experts. Start your rock tumbling journey with KoolStone, the brand trusted by thousands of families and hobbyists. The C1 Rock Tumbler is a classic model that balances reliable performance with all-in-one convenience. From the classic C1 to the Pro, Pro Max, and Pro Ultra, KoolStone continues to evolve with exclusive designs and upgraded performance for every rock enthusiast — ready to start your rock tumbling journey.
START A TUMBLING JOURNEY -- C1 Rock Tumbler turn rough rocks into polished gems, then you will be very excited to see the stones change with each cycle. That's a fun process of rock tumbling and a family little project for parent-child endeavor.
KomeStone K5 Rock Tumbler for Kids & Starters– Dual Noise-Reducing Rock Polisher with Timer, 3 Speeds & Memory Function, Complete Stone Tumbling Kit with Gems & All Accessories – A Fun STEM Gift
KomeStone
omeStone K5
11.42 x 7.72 x 7.68 inches
4.9384 pounds
Ratings for KomeStone (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KS 2026 | - | ❌ | ❌ | ❌ |
Features
💡 We have also prepared extra belts for your spare use at no cost. Reach out to our customer center to get some — absolutely free.
𝟗𝟎-𝐃𝐚𝐲 𝐅𝐫𝐞𝐞 𝐓𝐫𝐢𝐚𝐥 & 𝟏-𝐘𝐞𝐚𝐫 𝐖𝐚𝐫𝐫𝐚𝐧𝐭𝐲 — 𝐖𝐨𝐫𝐫𝐲-𝐅𝐫𝐞𝐞 𝐏𝐮𝐫𝐜𝐡𝐚𝐬𝐞: Includes a 𝟗𝟎-𝐝𝐚𝐲 𝐟𝐫𝐞𝐞 𝐭𝐫𝐢𝐚𝐥 and 𝟏-𝐲𝐞𝐚𝐫 𝐰𝐚𝐫𝐫𝐚𝐧𝐭𝐲 for added peace of mind. If Amazon’s 30-day return window is missed, 𝐔𝐒-𝐛𝐚𝐬𝐞𝐝 𝐜𝐮𝐬𝐭𝐨𝐦𝐞𝐫 𝐬𝐮𝐩𝐩𝐨𝐫𝐭 𝐢𝐬 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 to assist with replacement or refund requests. 𝐑𝐞𝐩𝐥𝐚𝐜𝐞𝐦𝐞𝐧𝐭 𝐩𝐚𝐫𝐭𝐬 𝐫𝐞𝐦𝐚𝐢𝐧 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐥𝐨𝐧𝐠-𝐭𝐞𝐫𝐦 to help keep the rock tumbler in working condition.
Top 20
Best for starter
Large 10LB Rock Tumbler Grit and Polish Refill Kit - 4 Step Grits Polish Up to 70 LBS Rocks, Dual Tumbling Media (Ceramic & Plastic Pellets), Ideal for National Geographic, Koolstone &All Rock Tumbler
AtoRock
Ratings for AtoRock (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| DK. LLC | - | ❌ | ❌ | ❌ |
Features
Professional 4-Step Polishing - Up to 80% Shine: The rock tumbler grit kit follows a strict 4-stage process: coarse grinding, medium grinding, pre-polishing, and final polishing. By using different thicknesses of grits, it can easily turn rough raw stones, sea glass, etc. into smooth and glossy finished products, with a shine of up to 80%, presenting a professional polishing effect.
Complete Grit Kit with All Necessary Part: This rock tumbling grit set includes full polishing consumables: 2 lbs 60 grit-coarse silicon carbide, 2 lbs 150‑grit medium silicon carbide, 1.5 lbs 600‑grit fine silicon carbide, 1.5 lbs 1200‑grit aluminum oxide, 2 lbs ceramic media, 1 lb plastic pellets, and 2 measuring spoons - no extra purchases needed.
VIYUKI Professional Rock Tumbler Kit - Double Drum 6LB Lapidary Polisher for Adults (Double Barrel), Includes Rough Gemstones, 8 Polishing Grits, Jewelry, Learning Guide, Great Stem Science Kit
VIYUKI
VI-RT-02
4.45 x 4.45 x 4.72 inches
Ratings for VIYUKI (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| VIYUKI | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
🍀EASY TO CREATE YOUR GEMSTONES - Rock tumblers for adults are a fantastic and exciting activity for all ages. Easy operation and durable design. Learn the fun process of rock tumbling with this beginners/professional rock stone tumbler. It will turn rough rocks into beautifully polished gemstones. It is a hugely popular hobby for adults!
🍀A ROCK TUMBLER MACHINE MADE TO LAST – Our high-quality tumblers are made with a metal case and durable motor that’s designed to last for years. The 2X3LB leakproof rubber barrel reduces sound, making it quieter than other plastic models. Excellent STEM activity for adults.
Top 22
WireJewelry Gemstones of The World Tumbler Refill Kit - 3 Lbs. of Handpicked Rock, 2 Batches of 4 Step Abrasive Grit and Polish with Plastic Pellets
WireJewelry
G24-GR2-399P
5.5 pounds
Ratings for WireJewelry (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WireJewelry | - | ❌ | ❌ | ❌ |
Features
3 Lb Gemstones of the World Mix, Includes at Least 20 Different Handpicked Stone Types
Rough Stones Average in Size between 1.5 to 2 Inches with 20-30 Gram Weight
Top 23
NATIONAL GEOGRAPHIC Rock Refill – Mega Madagascar Pack, 3 lb of Gemstones Including Rose Quartz, Jasper, Labradorite, & More, Tumbler Grit & Jewelry Settings
Blue Marble
NGMADREFILLMEGA
6.0 x 5.5 x 7.0 Inches
3.96 pounds
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
REAL GEMSTONES FROM MADAGASCAR - 3 pounds of raw rocks includes rose quartz, labradorite, red jasper, yellow jasper, indigo gabbro, and polychrome jasper, quantities of each gemstone may vary
FOUR GRADES OF GRIT - Coarse, Medium, Fine, Polish. Transform your raw stones from rough rocks to dazzling gemstones, this refill kit also works with all rock tumblers
The Thames & Kosmos Rock Tumbler Refill Pack for use with The Thames & Kosmos Rock Tumbler, Essential STEM Tool for Kids | Includes Rough Rocks, Polishing Grit, Jewelry Settings
Thames & Kosmos
678008
4.5 x 2.0 x 9.6 inches
1.0 Pounds
- Published: English
Ratings for Thames & Kosmos (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Refill pack for the Thames & Kosmos Rock Tumbler Essential STEM Tool
Includes a collection of rough rocks, polishing grit, and jewelry settings.
Top 25
3.6LB Professional Rock Tumbler Kit, 3 Speed Settings & Digital 9-Day Timer, Rough Gemstones, 4 Polishing Grits
AliKids
9.0551 x 7.874 x 7.0866 inches
Ratings for AliKids (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| AliKids Toy | - | ❌ | ❌ | ❌ |
Features
3.6LB ULTIMATE ROCK TUMBLING KIT - Prepare to transform rough rocks into polished gems with our comprehensive kit, which features a professional-grade rock tumbler, a low-noise barrel, 9 different types of gemstones, 4 polishing grits, extra belt，filler media, a sifter, jewelry fastenings, and a detailed learning guide.
TRANSFORM ROUGH STONES INTO SPARKLING GEMS - With our rock tumbler kit, you can effortlessly polish any stone and produce stunning gemstones from ordinary rocks. Our user-friendly design ensures simple operation and long-lasting performance.
Top 26
WireJewelry Brazilian Rock Tumbler Refill Kit - 1.5 Lbs. of Brazilian Stone Mix and 1 Batch of 4 Step Abrasive Grit and Polish
WireJewelry
G24-GR1-119
1.5 pounds
Ratings for WireJewelry (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WireJewelry | - | ❌ | ❌ | ❌ |
Features
1.5 Lbs Brazilian Stone Mix, Includes up to 15 Different Types of Stones from List in Description.
Rough Stones Average in Size between 1.5" to 2" with 20-30 Gram Weight
Top 27
WireJewelry Asia Rock Tumbler Refill Kit - 3 Lbs. of Asia Stone Mix and 2 Batches of 4 Step Abrasive Grit and Polish
WireJewelry
G24-GR2-318
4.75 pounds
Ratings for WireJewelry (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WireJewelry | - | ❌ | ❌ | ❌ |
Features
3 Lbs Asia Stone Mix, Includes up to 25 Different Types of Stones from List in Description.
Rough Stones Average in Size between 1.5" to 2" with 20-30 Gram Weight
NATIONAL GEOGRAPHIC Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults
Blue Marble
NGHOBBYTUMBLER
13.81 x 4.88 x 8.06 Inches
5.07 pounds
- Unknown: English
Ratings for Blue Marble (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| National Geographic Toys | 2,794 | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| Northeast Distributions LLC | - | ❌ | ❌ | ❌ |
Features
CREATE YOUR OWN GEMSTONES - Make any stone sparkle and polish everyday rocks into dazzling gemstones! This rock tumbler kit makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.
A TUMBLER THAT'S MADE TO LAST – Our high-quality tumblers are made with a durable motor that’s designed to last for years. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. An excellent STEM activity for kids.
Top 29
WireJewelry Rainbow Fluorite Rock Tumbler Refill Kit - 1.5 Lbs. of Rainbow Fluorite Stone Mix and 1 Batch of 4 Step Abrasive Grit and Polish
WireJewelry
G24-GR1-125
1.5 pounds
Ratings for WireJewelry (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WireJewelry | - | ❌ | ❌ | ❌ |
Features
1.5 Lbs Rough Rainbow Fluorite Stone Mix
Rough Untreated Stone
Top 30
KomeStone Rough Raw Colorful Rocks & Rock Tumbler Polishing Refill Grits, High Performance Polishing Grits and Crystal Stones for Another Batch of Rocks Tumbling, Suitable for All Rock Tumblers
KomeStone
KS0107RT10
5.0 x 6.0 x 4.0 Inches
1.3206 pounds
Ratings for KomeStone (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KomeStone Direct | - | ❌ | ❌ | ❌ |
Features
Comprehensive Polishing Kit: This set includes 4 bags of polishing grits—#Step 1, #Step 2, #Step 3, and #Step 4—providing everything you need for a complete rock tumbling process.
Variety of Rough Rocks: Comes with 9 different types of rough rocks, perfect for achieving diverse and stunning results with your rock tumbler.
Top 10 Rock Tumbler Grit Refill Kits - Verified to Buy (September 2026)
- 1. National Geographic Rock Tumbler Refill Kit - 1 Lb. Mix...
- 2. Rock Tumbler Grit Kit, 4LBS Polish Refill with Ceramic Tumbling...
- 3. NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 3 lbs. of...
- 4. NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 1 Lb. Jasper...
- 5. NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1 Lb. Madagascar...
- 6. KomeStone Rock Tumbler Grit Kit - 4LB 4-Step Polish Refill...
- 7. NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 5 lb. Mix...
- 8. Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing...
- 9. NATIONAL GEOGRAPHIC Rock Tumbler Kit - 3 Lb. Extra Large...
- 10. KomeStone Rock Tumbler Grit and Polish Refill Kit - 6...
Top 10 Rock Tumbler Grit Refill Kits Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- Blue Marble
- AtoRock
- KomeStone
- Dan&Darci
- KoolStone
- Rockhound's First Choice
- MJR Tumblers
- VIYUKI
- WireJewelry
- Thames & Kosmos
Related Rock Tumbler Grit Refill Kits Guides
For more personalized Rock Tumbler Grit Refill Kits guides, Check those pages,
Featured Topics
Top 8 Rock Tumbler Grit Refill Kits 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. National Geographic Toys : 21,830 Yearly Feedback , Avg. Ratings 4.9
- 2. Surreal Brands : 19,555 Yearly Feedback , Avg. Ratings 4.9
- 3. WireJewelry : 3,726 Yearly Feedback , Avg. Ratings 4.8
- 4. MJR Tumblers : 581 Yearly Feedback , Avg. Ratings 4.7
- 5. KomeStone Direct : 554 Yearly Feedback , Avg. Ratings 4.9
- 6. Rockhound's1stChoice : 396 Yearly Feedback , Avg. Ratings 4.9
- 7. Amazon.com : 386 Yearly Feedback , Avg. Ratings 4.7
- 8. VIYUKI : 161 Yearly Feedback , Avg. Ratings 4.9
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | National Geographic Toys | 21,830 | 4.9 |
| 🥈 | Surreal Brands | 19,555 | 4.9 |
| 🥉 | WireJewelry | 3,726 | 4.8 |
| 4 | MJR Tumblers | 581 | 4.7 |
| 5 | KomeStone Direct | 554 | 4.9 |
| 6 | Rockhound's1stChoice | 396 | 4.9 |
| 7 | Amazon.com | 386 | 4.7 |
| 8 | VIYUKI | 161 | 4.9 |
[Get] Rock Tumbler Grit Refill Kits Deals (✅Exclusively for Prime)
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Why Should You Trust Us?
Now hundreds and thousands of Learning & Education 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 Rock Tumbler Grit Refill Kits to buy for new September 2026?
CherryPicks’s Methodology for Evaluating Rock Tumbler Grit Refill Kits
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 Learning & Education 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 65 of Rock Tumbler Grit Refill Kits reviews based on our selection criteria. It helped us shortlist the top qualified and rated Rock Tumbler Grit Refill Kits for Learning & Education, We found that most customers choose Rock Tumbler Grit Refill Kits with an average price of $54.68, and the top brands are Dan&Darci, Thames & Kosmos, MJR Tumblers And WireJewelry.
Then our expert-level editors reviewed all those quality items and selected the top 30 Rock Tumbler Grit Refill Kits for you, We have researched hundreds of sellers and picked the top sellers for Learning & Education, including Amazon Resale, National Geographic Toys, Surreal Brands, WireJewelry, MJR Tumblers, KomeStone Direct, Rockhound's1stChoice, Amazon.com And VIYUKI. The National Geographic Rock Tumbler Refill Kit - 1... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 292 consumers with an average rating of 4.3.
We've helped a lot of satisfied users get the right Toys & Games product based on their needs, and save lots of time for them to pick Rock Tumbler Grit Refill Kits to buy.
Cody Jerrems is a programmer, a game lover, and a series movies enthusiast. He loves to write about his interest which is programming, game, and movies. On this platform, he would be providing us reviews, guides, and recommendations on games.