10 Best Rock Tumbler Polishing Grit of 2026

Last updated on 06/03/2026

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KomeStone Rock Tumbler Grit and Polish Refill Kit - 10 Pounds, Ultimate Value Pack with Ceramic & Plastic Pellets, Polishes Up to 70 lbs. of Rocks, 4-Step Tumbling Media, Works with All Rock Tumblers

KomeStone Rock Tumbler Grit and Polish Refill Kit - 10 Pounds, Ultimate Value Pack with Ceramic & Plastic Pellets, Polishes Up to 70 lbs. of Rocks, 4-Step Tumbling Media, Works with All Rock Tumblers

KomeStone

7% Off

Why we love it

Versatile for all skill levels.
Comprehensive tumbling process included.
High-quality grits ensure success.

Main Highlights

KomeStone's best-selling rock tumblers offer something for everyone: the K1and K1 Pro (2.5 lb capacity, with the Pro featuring a brushless motor), the K2 (3 lb capacity with a noise-reducing cover), and the K4 (dual barrel, 7 lb capacity, brushless motor, and noise-reducing cover). Perfect for both beginners and experienced rock collectors.
4-Step Polishing Kit: Complete 4-step rock tumbling kit with 6 bottles—4 polishing grits, 1 ceramic pellets, 1 plastic pellets—totaling 10 lbs.
High-Quality Grits: Includes Silicon Carbide (2 lbs, 2 lbs, 1.5 lbs) and Aluminum Oxide (1.5 lbs), plus 1 lb of ceramic pellets and 1 lb of plastic pellets. Use ceramic pellets throughout all stages.
Easy Measurement & Storage: Comes with two small spoons and individual packaging for each grit. Simple to measure and store with no mess.
Versatile & Compatible: Suitable for any rock and tumbler. Add grits based on rock weight for optimal results.
Comprehensive Rock Tumbling Kit: Includes all essential components for a complete tumbling process. Explore our range of tumblers to find the perfect match for rocks collectors whether you’re a beginner or an experienced hobbyist.

9.7

Exceptional

9.7

Exceptional

KomeStone

KomeStone Rock Tumbler Grit and Polish Refill Kit - 10 Pounds, Ultimate Value Pack with Ceramic & Plastic Pellets, Polishes Up to 70 lbs. of Rocks, 4-Step Tumbling Media, Works with All Rock Tumblers

7% Off

Why we love it

Versatile for all skill levels.
Comprehensive tumbling process included.
High-quality grits ensure success.

Main Highlights

KomeStone's best-selling rock tumblers offer something for everyone: the K1and K1 Pro (2.5 lb capacity, with the Pro featuring a brushless motor), the K2 (3 lb capacity with a noise-reducing cover), and the K4 (dual barrel, 7 lb capacity, brushless motor, and noise-reducing cover). Perfect for both beginners and experienced rock collectors.
4-Step Polishing Kit: Complete 4-step rock tumbling kit with 6 bottles—4 polishing grits, 1 ceramic pellets, 1 plastic pellets—totaling 10 lbs.
High-Quality Grits: Includes Silicon Carbide (2 lbs, 2 lbs, 1.5 lbs) and Aluminum Oxide (1.5 lbs), plus 1 lb of ceramic pellets and 1 lb of plastic pellets. Use ceramic pellets throughout all stages.
Easy Measurement & Storage: Comes with two small spoons and individual packaging for each grit. Simple to measure and store with no mess.
Versatile & Compatible: Suitable for any rock and tumbler. Add grits based on rock weight for optimal results.
Comprehensive Rock Tumbling Kit: Includes all essential components for a complete tumbling process. Explore our range of tumblers to find the perfect match for rocks collectors whether you’re a beginner or an experienced hobbyist.

Value for Money

KoolStone Rock Tumbler Grit and Ceramic Tumbling Media 4 Pounds, Polish Up to 25 lbs. of Rocks, 4-Step Polish Refill Media Kit, Compatible with All Rock Tumblers, Essential Polishing Kit for Adults

KoolStone Rock Tumbler Grit and Ceramic Tumbling Media 4 Pounds, Polish Up to 25 lbs. of Rocks, 4-Step Polish Refill Media Kit, Compatible with All Rock Tumblers, Essential Polishing Kit for Adults

KoolStone

Why we love it

Reliable professional-grade results.
Versatile for beginners and pros.
All-in-one grit kit.

Main Highlights

KoolStone Rock Tumblers for Every Level: Choose from our versatile lineup: the C1 and C1 Pro (2.5 lb capacity; Pro features a brushless motor for quieter, more efficient operation), the C1 Pro Max (3 lb capacity with noise-reducing cover), and the C1 Pro Ultra (dual barrel, 7 lb capacity, brushless motor, and noise-reducing cover). Each tumbler is designed to deliver consistent, high-quality results for both beginners and experienced rock collectors.
All-in-One Tumbling Solution: This complete 4 lb grit kit includes everything needed for a full 4-step rock tumbling process. Each set contains 1 lb of Step 1 (60-grit coarse silicon carbide), 1 lb of Step 2 (150-grit medium silicon carbide), ½ lb of Step 3 (600-grit fine silicon carbide), ½ lb of Step 4 (1200-grit aluminum oxide polish), and 1 lb of ceramic tumbling media for optimal barrel balance and smooth tumbling action.
Professional-Grade Results for Every Level: Designed to deliver consistent, high-quality finishes from rough shaping to final polishing. Whether you’re a beginner or an experienced lapidarist, this kit ensures a flawless transition through each stage for glossy, professional-grade stones.
High Efficiency – Polish up to 25 lbs of Rocks: Each set provides enough grit and media to process up to 25 lbs of stones across multiple batches. Ideal for continuous projects or large-capacity tumblers, ensuring cost-effective and efficient tumbling sessions.
Recommended Usage – For optimal results, use about 2 tablespoons (≈25–30 g) of grit per 1 lb of stones in each stage. Add just enough water to cover the stones inside the barrel and tumble for 7–10 days per step, checking periodically and adding water if needed to maintain smooth rotation. Adjust tumbling time slightly depending on stone hardness and size.
Compatible with All Rock Tumblers: Suitable for both rotary and vibratory tumblers. Perfect for hobbyists, classrooms, and professional workshops alike—KoolStone grit kits are engineered to help you transform rough rocks into smooth, glass-like gems with ease and precision.

KoolStone Rock Tumbler Grit and Ceramic Tumbling Media 4 Pounds, Polish Up to 25 lbs. of Rocks, 4-Step Polish Refill Media Kit, Compatible with All Rock Tumblers, Essential Polishing Kit for Adults

Why we love it

Reliable professional-grade results.
Versatile for beginners and pros.
All-in-one grit kit.

Main Highlights

KoolStone Rock Tumblers for Every Level: Choose from our versatile lineup: the C1 and C1 Pro (2.5 lb capacity; Pro features a brushless motor for quieter, more efficient operation), the C1 Pro Max (3 lb capacity with noise-reducing cover), and the C1 Pro Ultra (dual barrel, 7 lb capacity, brushless motor, and noise-reducing cover). Each tumbler is designed to deliver consistent, high-quality results for both beginners and experienced rock collectors.
All-in-One Tumbling Solution: This complete 4 lb grit kit includes everything needed for a full 4-step rock tumbling process. Each set contains 1 lb of Step 1 (60-grit coarse silicon carbide), 1 lb of Step 2 (150-grit medium silicon carbide), ½ lb of Step 3 (600-grit fine silicon carbide), ½ lb of Step 4 (1200-grit aluminum oxide polish), and 1 lb of ceramic tumbling media for optimal barrel balance and smooth tumbling action.
Professional-Grade Results for Every Level: Designed to deliver consistent, high-quality finishes from rough shaping to final polishing. Whether you’re a beginner or an experienced lapidarist, this kit ensures a flawless transition through each stage for glossy, professional-grade stones.
High Efficiency – Polish up to 25 lbs of Rocks: Each set provides enough grit and media to process up to 25 lbs of stones across multiple batches. Ideal for continuous projects or large-capacity tumblers, ensuring cost-effective and efficient tumbling sessions.
Recommended Usage – For optimal results, use about 2 tablespoons (≈25–30 g) of grit per 1 lb of stones in each stage. Add just enough water to cover the stones inside the barrel and tumble for 7–10 days per step, checking periodically and adding water if needed to maintain smooth rotation. Adjust tumbling time slightly depending on stone hardness and size.
Compatible with All Rock Tumblers: Suitable for both rotary and vibratory tumblers. Perfect for hobbyists, classrooms, and professional workshops alike—KoolStone grit kits are engineered to help you transform rough rocks into smooth, glass-like gems with ease and precision.

NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media

NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media

Blue Marble

Why we love it

Dazzling polish with quality grit.
Improves rock tumbling results.
Compatible with any tumbler.

Main Highlights

QUALITY RESULTS AND DAZZLING POLISH - The rock polishing grit in this pack is high-quality silicon carbide and will polish 8-10 lbs of rocks. Includes measuring scoop and storage containers with secure screw-top closures for easy storage.
IMPROVE YOUR ROCK TUMBLING RESULTS – Ceramic tumbler media makes the entire rock tumbling process more effective, improving delivery of rock tumbling grit, quieting tumbler noise, reducing rock breakage, and acting as a filler for smaller batches.
PATENTED WAY TO MAKE TUMBLED ROCKS SHINE – GemFoam is a unique, patented rock polisher media that gives unprecedented shine to tumbled rocks. Just add GemFoam to your tumbler after the final grit cycle for great results!
WORKS WITH ANY ROCK TUMBLER – The tumbling supplies in this set are safe to use with any rock tumbler. The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results.
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media

Why we love it

Dazzling polish with quality grit.
Improves rock tumbling results.
Compatible with any tumbler.

Main Highlights

QUALITY RESULTS AND DAZZLING POLISH - The rock polishing grit in this pack is high-quality silicon carbide and will polish 8-10 lbs of rocks. Includes measuring scoop and storage containers with secure screw-top closures for easy storage.
IMPROVE YOUR ROCK TUMBLING RESULTS – Ceramic tumbler media makes the entire rock tumbling process more effective, improving delivery of rock tumbling grit, quieting tumbler noise, reducing rock breakage, and acting as a filler for smaller batches.
PATENTED WAY TO MAKE TUMBLED ROCKS SHINE – GemFoam is a unique, patented rock polisher media that gives unprecedented shine to tumbled rocks. Just add GemFoam to your tumbler after the final grit cycle for great results!
WORKS WITH ANY ROCK TUMBLER – The tumbling supplies in this set are safe to use with any rock tumbler. The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results.
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

Polly Plastics Rock Tumbler Grit and Polish Refill & Ceramic Tumbling Filler Media - Silicone Carbide Polisher Grit - Rock Polish Supplies & Accessories

Polly Plastics Rock Tumbler Grit and Polish Refill & Ceramic Tumbling Filler Media - Silicone Carbide Polisher Grit - Rock Polish Supplies & Accessories

Polly Plastics

Why we love it

Dazzling polish for all rocks.
Complete grit and polish kit.
Works with any brand tumbler.

Main Highlights

PUT A DAZZLING POLISH ON YOUR ROCKS with Polly Plastics rock tumbler grit and polish refill. Our one-of-a-kind rock polisher kit contains four different kinds of grits to provide initial shaping, smoothen the rock surface, pre-polish the rocks and finally polish the rocks for a professional-looking finish. Great polishing compounds for kids and adults alike.
PACKAGE CONTAINS - 1 lb. 60/90 Coarse Silicon Carbide Grit, 1 lb. 180/220 Medium Silicon Carbide Grit, ½ lb. 500 Fine Silicon Carbide, ½ lb. 1200 Aluminum Oxide Final Polish.
GRIT SOLD BY WEIGHT NEEDED FOR EACH STEP – Steps 1 & 2 are 1 lb. each and Steps 3 & 4 are ½ lb. each but all are sold in the same size jars for packaging consistency. The different weights, along with different densities, will mean that jars will not have equal amounts of fullness.
PREMIUM POLISHING MATERIALS, COMPATIBLE WITH ALL BRAND TUMBLERS - Proven to produce a beautiful polish. Made in the USA.
BEGINNER FRIENDLY - Complete, easy-to-follow instructions included with rock tumbling tips. 100% satisfaction guaranteed.

Polly Plastics Rock Tumbler Grit and Polish Refill & Ceramic Tumbling Filler Media - Silicone Carbide Polisher Grit - Rock Polish Supplies & Accessories

Why we love it

Dazzling polish for all rocks.
Complete grit and polish kit.
Works with any brand tumbler.

Main Highlights

PUT A DAZZLING POLISH ON YOUR ROCKS with Polly Plastics rock tumbler grit and polish refill. Our one-of-a-kind rock polisher kit contains four different kinds of grits to provide initial shaping, smoothen the rock surface, pre-polish the rocks and finally polish the rocks for a professional-looking finish. Great polishing compounds for kids and adults alike.
PACKAGE CONTAINS - 1 lb. 60/90 Coarse Silicon Carbide Grit, 1 lb. 180/220 Medium Silicon Carbide Grit, ½ lb. 500 Fine Silicon Carbide, ½ lb. 1200 Aluminum Oxide Final Polish.
GRIT SOLD BY WEIGHT NEEDED FOR EACH STEP – Steps 1 & 2 are 1 lb. each and Steps 3 & 4 are ½ lb. each but all are sold in the same size jars for packaging consistency. The different weights, along with different densities, will mean that jars will not have equal amounts of fullness.
PREMIUM POLISHING MATERIALS, COMPATIBLE WITH ALL BRAND TUMBLERS - Proven to produce a beautiful polish. Made in the USA.
BEGINNER FRIENDLY - Complete, easy-to-follow instructions included with rock tumbling tips. 100% satisfaction guaranteed.

10 lbs Rock Tumbler Grit - Tumbler Media Grit,Rock Polishing Grit Media, Works with Any Rock Tumbler, Rock Polisher, Stone Polisher,COARSE 60/90 Silicon Carbide Grit, Step 1 for Tumbling Stones

10 lbs Rock Tumbler Grit - Tumbler Media Grit,Rock Polishing Grit Media, Works with Any Rock Tumbler, Rock Polisher, Stone Polisher,COARSE 60/90 Silicon Carbide Grit, Step 1 for Tumbling Stones

YHAspace

Why we love it

High-quality silicon carbide grit.
Compatible with any rock tumbler.
Mess-free, re-closable packaging.

Main Highlights

10 lb 60/90 Tumbling Grit Coarse Rock Polishing Silicon Carbide,Step 1 Tumbler Media Grit ,COARSE 60/90 Silicon Carbide Grit, Step 1 for Tumbling Stones
High Quality Graded Black Silicon Carbide Grit,Compatible with ANY BRAND OF Rock Tumbler
10 pounds Coarse size 60/90 silicon carbide grit for rock tumbling (STEP1).
The rock tumbling grit is packaged in a re-closable jars to prevent messy spills and to safely store unused grit .
100% satisfaction guarantee on all our products.

10 lbs Rock Tumbler Grit - Tumbler Media Grit,Rock Polishing Grit Media, Works with Any Rock Tumbler, Rock Polisher, Stone Polisher,COARSE 60/90 Silicon Carbide Grit, Step 1 for Tumbling Stones

Why we love it

High-quality silicon carbide grit.
Compatible with any rock tumbler.
Mess-free, re-closable packaging.

Main Highlights

10 lb 60/90 Tumbling Grit Coarse Rock Polishing Silicon Carbide,Step 1 Tumbler Media Grit ,COARSE 60/90 Silicon Carbide Grit, Step 1 for Tumbling Stones
High Quality Graded Black Silicon Carbide Grit,Compatible with ANY BRAND OF Rock Tumbler
10 pounds Coarse size 60/90 silicon carbide grit for rock tumbling (STEP1).
The rock tumbling grit is packaged in a re-closable jars to prevent messy spills and to safely store unused grit .
100% satisfaction guarantee on all our products.

10 LBS Rock Tumbler Grit Set, Rock Tumbler Grit Refill Kit, Tumbling Media,4-Steps Supplies for Tumbling and Polishing Stones and Gems

GANGOU

Why we love it

High-quality polishing materials.
Compatible with any tumbler.
Satisfaction guarantee included.

Main Highlights

The total weight of the 4 Step grit kit is 10 LB, enough for you to polish more gems.
KIT CONTAINS: Step 1 Coarse Grit(2 LB); Step 2 Medium Grit(2 LB); Step 3 Pre-Polish(1.5 LB);Step 4 Final Polish(1.5 LB),Ceramic Filler(2 LB);Strong Polishing Beads(1 LB). One spoon
Compatible with ANY BRAND OF Rock Tumbler，If you want a finer effect，you can Email us,we can comminicate polishing tips together.
Purchase with confidence. We proudly back our product with a 100% satisfaction guarantee

10 LBS Rock Tumbler Grit Set, Rock Tumbler Grit Refill Kit, Tumbling Media,4-Steps Supplies for Tumbling and Polishing Stones and Gems

Why we love it

High-quality polishing materials.
Compatible with any tumbler.
Satisfaction guarantee included.

Main Highlights

The total weight of the 4 Step grit kit is 10 LB, enough for you to polish more gems.
KIT CONTAINS: Step 1 Coarse Grit(2 LB); Step 2 Medium Grit(2 LB); Step 3 Pre-Polish(1.5 LB);Step 4 Final Polish(1.5 LB),Ceramic Filler(2 LB);Strong Polishing Beads(1 LB). One spoon
Compatible with ANY BRAND OF Rock Tumbler，If you want a finer effect，you can Email us,we can comminicate polishing tips together.
Purchase with confidence. We proudly back our product with a 100% satisfaction guarantee

10 Pounds Rock Tumbler Grit Refill - Rock Polishing Grit Media Kit

10 Pounds Rock Tumbler Grit Refill - Rock Polishing Grit Media Kit

YHAspace

Why we love it

Includes coarse to final polish.
Compatible with any tumbler.
Easy to follow steps.

Main Highlights

10LB KIT CONTAINS: Step 1 Coarse Grit(2 LB); Step 2 Medium Grit(2 LB); Step 3 Pre-Polish(1.5 LB);Step 4 Final Polish(1.5 LB),Ceramic Filler(2 LB);Strong Polishing Beads(1 LB).
Compatible with ANY BRAND OF Rock Tumbler
Easy to Follow Step by Step Instructions
100% satisfaction guaranteed
STEP1, 60/90 Coarse Silicon Carbide Grit. STEP2, 180/220 Medium Silicon Carbide Grit. STEP3, 500 Fine Silicon Carbide. STEP4, 1500 Aluminum Oxide Polish.

10 Pounds Rock Tumbler Grit Refill - Rock Polishing Grit Media Kit

Why we love it

Includes coarse to final polish.
Compatible with any tumbler.
Easy to follow steps.

Main Highlights

10LB KIT CONTAINS: Step 1 Coarse Grit(2 LB); Step 2 Medium Grit(2 LB); Step 3 Pre-Polish(1.5 LB);Step 4 Final Polish(1.5 LB),Ceramic Filler(2 LB);Strong Polishing Beads(1 LB).
Compatible with ANY BRAND OF Rock Tumbler
Easy to Follow Step by Step Instructions
100% satisfaction guaranteed
STEP1, 60/90 Coarse Silicon Carbide Grit. STEP2, 180/220 Medium Silicon Carbide Grit. STEP3, 500 Fine Silicon Carbide. STEP4, 1500 Aluminum Oxide Polish.

NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies

NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies

Blue Marble

Why we love it

High-quality silicon carbide grit.
Easy four-stage polishing process.
Compatible with all rock tumblers.

Main Highlights

HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass, and more!
EASY TO USE, FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish!
COMPATIBLE WITH ALL TUMBLERS - This complete 4-step rock tumbler grit refill kit works with all rock tumblers. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies.
EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure.
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies

Why we love it

High-quality silicon carbide grit.
Easy four-stage polishing process.
Compatible with all rock tumblers.

Main Highlights

HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass, and more!
EASY TO USE, FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish!
COMPATIBLE WITH ALL TUMBLERS - This complete 4-step rock tumbler grit refill kit works with all rock tumblers. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies.
EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure.
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

3LB Rock Tumbler Grit and Polish Refill Set, 4-Step Professional Polish Rock Tumbler Grit to Unlock Stunning Polished Stones. Ideal for National Geographic, KomeStone, and Other Polishers and Tumblers

3LB Rock Tumbler Grit and Polish Refill Set, 4-Step Professional Polish Rock Tumbler Grit to Unlock Stunning Polished Stones. Ideal for National Geographic, KomeStone, and Other Polishers and Tumblers

LARICEO

Why we love it

High-quality materials ensure durability.
Easy to achieve polished finish.
Compatible with all tumblers.

Main Highlights

High Quality: Our rock tumbling grit is made from premium materials, ensuring durability and long-lasting performance. You can trust that our product will deliver excellent, consistent results every time.
Easy to Use: Our Rock Tumbler Grit and Polish Refill is designed to provide a smooth and polished finish to your rocks. With four stages of grit, You can effortlessly achieve the desired brilliance！
Compatible with All Tumblers: Whether you have a small or large rock tumbler, our rock polishing grit is compatible with all types of tumblers. You can confidently use our product with any brand or model.
Packaging Contents: 1 lb. of 60/90 coarse silicon carbide grit, 1 lb. of 180/220 medium silicon carbide grit, 2/1 lb. of 500 fine silicon carbide grit, 2/1 lb. of 1200 aluminum oxide polish, along with a user-friendly instruction manual and a spoon.
AFTER-SALES SERVICE: We strictly bottle by weight, so there are two bottles that are half-filled.If you are not satisfied with our rock tumbling grit and polish refill kit, please feel free to contact us and we will try our best to solve your problem.

3LB Rock Tumbler Grit and Polish Refill Set, 4-Step Professional Polish Rock Tumbler Grit to Unlock Stunning Polished Stones. Ideal for National Geographic, KomeStone, and Other Polishers and Tumblers

Why we love it

High-quality materials ensure durability.
Easy to achieve polished finish.
Compatible with all tumblers.

Main Highlights

High Quality: Our rock tumbling grit is made from premium materials, ensuring durability and long-lasting performance. You can trust that our product will deliver excellent, consistent results every time.
Easy to Use: Our Rock Tumbler Grit and Polish Refill is designed to provide a smooth and polished finish to your rocks. With four stages of grit, You can effortlessly achieve the desired brilliance！
Compatible with All Tumblers: Whether you have a small or large rock tumbler, our rock polishing grit is compatible with all types of tumblers. You can confidently use our product with any brand or model.
Packaging Contents: 1 lb. of 60/90 coarse silicon carbide grit, 1 lb. of 180/220 medium silicon carbide grit, 2/1 lb. of 500 fine silicon carbide grit, 2/1 lb. of 1200 aluminum oxide polish, along with a user-friendly instruction manual and a spoon.
AFTER-SALES SERVICE: We strictly bottle by weight, so there are two bottles that are half-filled.If you are not satisfied with our rock tumbling grit and polish refill kit, please feel free to contact us and we will try our best to solve your problem.

12000 Grit Rock Tumbler Polish – Aluminum Oxide Final Stage (Step 5), Ultra Fine Polishing Powder for Mirror Finish & High Gloss Shine, for Rocks, Gems & Glass, Compatible with All Rock Tumblers, 1 LB

12000 Grit Rock Tumbler Polish – Aluminum Oxide Final Stage (Step 5), Ultra Fine Polishing Powder for Mirror Finish & High Gloss Shine, for Rocks, Gems & Glass, Compatible with All Rock Tumblers, 1 LB

KoolStone

5% Off

Why we love it

Smoother surfaces, brighter finish.
Premium finishing powder enhances shine.
Perfect for hobbyists and pros.

Main Highlights

KoolStone's Exclusive 12,000 Grit Sub-Micron Aluminum Oxide Polish stands in a league of its own—significantly finer than typical 800-1500 grit polishes. It removes the microscopic scratches that regular polish leaves behind, delivering a true mirror finish—not just high gloss.
The Final Step for a Higher Gloss Shine: Designed to be used AFTER standard 800–1500 grit polish, KoolStone 12000 grit acts as an ultra-fine finishing compound that enhances clarity, smoothness, and reflective shine beyond regular polishing stages.
Ideal for Final Polishing Step: Perfect for rock tumblers who want more than just "bright shine." This 12000 grit acts as a high-performance finishing agent, bringing out a deep, reflective, glass-like gloss on rocks, gems, and glass—turning shiny stones into display-quality specimens.
Regular polish gets you 90% there, KoolStone 12000 delivers the last 10% that makes all the difference. This ultra-fine powder smooths surfaces at a microscopic level, helping your finished pieces stand out with a clean, mirror-like appearance.
Compatible with Rotary & Vibratory Tumblers: Works with all major rock tumblers and polishing systems. Easy to use for beginners while delivering professional-level final polishing results for experienced tumblers.
Recommended Usage: Add about 2 scoops of polishing powder, then add water just enough to cover the stones. Tumble for 3–5 days, checking periodically and adding water as needed. For larger or harder stones, slightly extend tumbling time or increase to 3 scoops for optimal results.
Best Performance Tips: KoolStone 12000 Grit Polishing Powder performs best in properly maintained tumblers. Suitable for rotary & vibrating rock tumblers, and for best results, ensure your equipment is clean and prepared for the final polishing stage. Beginners are encouraged to familiarize themselves with polishing steps before use.

12000 Grit Rock Tumbler Polish – Aluminum Oxide Final Stage (Step 5), Ultra Fine Polishing Powder for Mirror Finish & High Gloss Shine, for Rocks, Gems & Glass, Compatible with All Rock Tumblers, 1 LB

5% Off

Why we love it

Smoother surfaces, brighter finish.
Premium finishing powder enhances shine.
Perfect for hobbyists and pros.

Main Highlights

KoolStone's Exclusive 12,000 Grit Sub-Micron Aluminum Oxide Polish stands in a league of its own—significantly finer than typical 800-1500 grit polishes. It removes the microscopic scratches that regular polish leaves behind, delivering a true mirror finish—not just high gloss.
The Final Step for a Higher Gloss Shine: Designed to be used AFTER standard 800–1500 grit polish, KoolStone 12000 grit acts as an ultra-fine finishing compound that enhances clarity, smoothness, and reflective shine beyond regular polishing stages.
Ideal for Final Polishing Step: Perfect for rock tumblers who want more than just "bright shine." This 12000 grit acts as a high-performance finishing agent, bringing out a deep, reflective, glass-like gloss on rocks, gems, and glass—turning shiny stones into display-quality specimens.
Regular polish gets you 90% there, KoolStone 12000 delivers the last 10% that makes all the difference. This ultra-fine powder smooths surfaces at a microscopic level, helping your finished pieces stand out with a clean, mirror-like appearance.
Compatible with Rotary & Vibratory Tumblers: Works with all major rock tumblers and polishing systems. Easy to use for beginners while delivering professional-level final polishing results for experienced tumblers.
Recommended Usage: Add about 2 scoops of polishing powder, then add water just enough to cover the stones. Tumble for 3–5 days, checking periodically and adding water as needed. For larger or harder stones, slightly extend tumbling time or increase to 3 scoops for optimal results.
Best Performance Tips: KoolStone 12000 Grit Polishing Powder performs best in properly maintained tumblers. Suitable for rotary & vibrating rock tumblers, and for best results, ensure your equipment is clean and prepared for the final polishing stage. Beginners are encouraged to familiarize themselves with polishing steps before use.