The Best Rock Polisher of 2023

Complete rock tumbling medium kit: 3.5 lbs. 4-step grit set and poly plastic pellets, to polish any rock. Packaged in easy-to-use-and-store bottles.

Includes: Step #1 Coarse Grit (1 lb.), Step #2 Medium Grit (1 lb.), Step #3 Pre-polish Grit (1/2 lb.), Step #4 Grit (1/2 lb), Polypropylene Plastic Poly Filler Pellets (1/2 lb.), Instruction Guide.

Compatible with all rock tumblers: Can be used in tumblers from any brand: Dan&Darci, Elenco, Lortone, National Geographic, Smithsonian, Thumler and more.

Easy to use: Includes a clear instruction guide on how to use the grits and plastic pellets.

100% satisfaction guaranteed: Love it, or your money back!  If you are not satisfied with the kit, we'll refund you 100% of the money, no questions asked.

CREATE YOUR OWN GEMSTONES - Make any stone sparkle and polish everyday rocks into dazzling gemstones! This rock polisher 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. Makes an excellent STEM gift or activity for girls and boys.

ALL-IN-ONE TUMBLING KIT - This complete kit has everything you need to create polished gemstones. In addition to the tumbler, four polishing grits, sifter, and rough gemstones, this bundle includes refill packs with 1lb each of rough gemstones and rough jasper. Learn all about the gemstones in your kit with the detailed, full-color learning guide.

EASY TO USE – Simple instructions and one-touch settings make rock tumbling fun and easy. Control the number of days for each tumbling cycle with the one-touch timer and automatic shutoff feature, so you can set it and forget it. This is a great gift for kids!

SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you.

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.

A COMPLETE HOBBY TUMBLING KIT - Everything you need to create polished gemstones: the tumbler, four polishing grits, sifter, nine types of real rough gemstones, plus a detailed full-color learning guide. Makes a great gift for girls and boys!

EASY TO USE – Simple instructions and one-touch settings make rock tumbling fun and easy. Control the number of days for each tumbling cycle with the one-touch timer and automatic shutoff feature, set it and forget it! This is a great gift for kids.

HIGH-QUALITY EDUCATIONAL TOYS - National Geographic is proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service.

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.

Powerful quality: Runs on a powerful heavy duty motor that will last for a very long time, and includes a leak-resistant barrel that runs quieter than the other brands.

Advanced features: Includes speed controls (providing more granular tumbling results), a 9-day timer (shuts off automatically when you desire), all displayed on beautiful LCD screens.

A fun and educational gift for all ages: It's not often that a science project can be fun and engaging, but this kit achieves both! It fascinates children and adults as soon as they pull it out of the box and is a perfect STEM project for any age. It fosters a love for science, geology and mineralogy in a fun and exciting way.

CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This professional 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 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.

ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get three pounds of rough rocks with nine different types of gemstones inside, five jewelry fastenings, grit, a strainer, and our innovative new GemFoam rock polisher.

USE GEMFOAM FOR DAZZLING RESULTS - This rock tumbler kit stands apart from others thanks to our new, reusable GemFoam rock polisher! Add GemFoam and water to the barrel after your final tumbling stage and your gems will have incredible shine!

SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you.

Power Adapter: 120V/60Hz Barrel Capacity: 3LB

Packaging List: Includes tumbler, 0.5lbs of walnut shell media, five v-belt, and instructions

Professional Features: The durable motor allows you to tumble multiple batches of rocks. An improved, leak-proof barrel is lined with rubber for quieter operation

Easy to Use: Detailed tumbler instructions lead you step-by-step through the rock tumbling process

HIGH QUALITY – This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on approximately 8-10 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 tumbling grit refill kit works with all rock polishers. For best results, use with National Geographic 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

SATISFACTION GUARANTEED – The National Geographic STEM series provides high-quality products that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you

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.

ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get ½ a pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, and our four-stage rock polishing grit.

EASY TO USE AND EDUCATIONAL - Detailed tumbler instructions lead you step-by-step through the rock tumbling process, A full-color learning guide details how rocks are naturally polished and has fascinating facts about the gemstones in the kit.

SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you.

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

A little goes a long way. Rock tumbling ceramic pellets are reusable and can be used during every rock polishing grit cycle. Ceramic polishing media is more effective than plastic tumbling media and will never stale or spoil

Compatible with any tumbler! These rock tumbler ceramic pellets are safe to use with any rock tumbler. This versatile rock polish accessory is a fantastic addition to your stock of tumbling supplies

Additional tumbling benefits. Ceramic tumbling media will wear down over time, but is still a useful rock tumbling accessory. Use worn pellets in place of smaller ceramic tumbler media. When tumbling is complete, wash and store for later use

Satisfaction guaranteed! The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you

Rock tumbling is a hugely popular hobby for kids and adults. This professional rock tumbler makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design

This durable tumbler is made to last. The motor has tumbling time control settings so you can set it and forget it. The leak-proof barrel features a stainless-steel lid.

This all-in-one tumbling kit has everything you need and then some. You get one pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, tumbler grit, a strainer, and our innovative new GemFoam polishing foam.

Use Gemfoam for dazzling results. This rock tumbler kit stands apart from others thanks to our new, reusable GemFoam rock polisher. Add GemFoam and water to the barrel after your final tumbling stage and your gems will have incredible shine

Satisfaction guaranteed. The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun. If your experience is anything less than extraordinary, let us know so we can make it right for you