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The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. A tumbler that's made to last – our high-quality tumblers are made with a durable motor that’s designed to last for years.
A complete hobby tumbling kit - everything you need to create polished gemstones: the tumbler, nine types of real rough gemstones, four polishing grits, sifter, plus a detailed full-color learning guide. 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.

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, a strainer, five jewelry fastenings, grit, and our innovative new GemFoam rock polisher.
A tumbler that's made to last - the durable motor has time and speed control settings so you can set it, and forget it.

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.
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.

Gemstones of 9 varieties - tiger's eye, agate, Dalmatian Jasper, Sodalite, Red Jasper, aventurine, Rose Quartz, Amethyst, Hematite.

Create your own gemstones - rock tumbling is a hugely popular hobby for kids and adults! This robust rock polisher makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.
An improved, leak-proof barrel features a stainless-steel lid. A tumbler that's made to last - the durable motor has time and speed control settings so you can set it, and forget it. All-in-one tumbling kit - you get 1/2 pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, tumbler grit, a strainer, and our innovative GemFoam polishing foam.

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.
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. In addition to the tumbler, four polishing grits, this bundle includes refill packs with 1lb each of rough gemstones and rough jasper. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. All-in-one tumbling kit - this complete kit has everything you need to create polished gemstones. Makes an excellent STEM gift or activity for girls and boys.

The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results. Quality grit results in a 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.
Just add the patent-pending rock polishing media 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. Brand new way to make tumbled rocks shine – gemfoam is a unique new rock polisher media that gives unprecedented shine to tumbled rocks.

Gemstones of nine varieties: tiger’s eye, Agate, Rose Quartz, Red Jasper, amethyst, Aventurine, Dalmatian Jasper, Sodalite, Black Jasper.

Create beautifully polished gemstones by tumbling the 8 varieties of raw jasper in your National Geographic Rock Tumbler sold separately.

1. NATIONAL GEOGRAPHIC
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Includes Rough Gemstones, Jewelry Fastenings, 4 Polishing Grits, Great Stem Science Kit, Learning Guide, NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit
#adNATIONAL GEOGRAPHIC #ad - 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.The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. A tumbler that's made to last – our high-quality tumblers are made with a durable motor that’s designed to last for years.
More information #ad
Makes a great gift for girls and boys! An excellent STEM activity for kids. Easy to use – simple instructions and one-touch settings make rock tumbling fun and easy. 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. A complete hobby tumbling kit - everything you need to create polished gemstones: the tumbler, nine types of real rough gemstones, four polishing grits, sifter, plus a detailed full-color learning guide. 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.
Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | JMW Sales, Inc #ad |
Height | 8.06 Inches |
Length | 13.81 Inches |
Weight | 4.63 pounds |
Width | 4.88 Inches |
Part Number | NGHOBBYTUMBLER |
Model | NGHOBBYTUMBLER |
Warranty | No Warranty |
More information #ad
2. NATIONAL GEOGRAPHIC
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3LB Extra Large Capacity, Jewelry Fastenings, 4 Polishing Grits, 3LB Rough Gemstones, an Educational STEM Science Kit, NATIONAL GEOGRAPHIC Rock Tumbling Kit
#adNATIONAL GEOGRAPHIC #ad - 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.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, a strainer, five jewelry fastenings, grit, and our innovative new GemFoam rock polisher.
More information #ad
An improved, leak-proof barrel features a stainless-steel lid is 75% quieter overall than plastic tumbler barrels. Use gemfoam for dazzling results - this rock polishing 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. A tumbler that's made to last - the durable motor has time and speed control settings so you can set it, and forget it.
Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | JMW Sales, Inc. #ad |
Height | 6.7 Inches |
Length | 12.6 Inches |
Weight | 8.16 Pounds |
Width | 10.25 Inches |
Part Number | NGTUMBLER3LB |
Model | NGTUMBLER3LB |
More information #ad
3. NATIONAL GEOGRAPHIC
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Complete Rock Tumbling Kit, Durable Leak-Proof Rock Polisher for Kids, Geology Hobby Science Kit, Rocks and Crystals for Kids, A Great STEM Activity, NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit
#adNATIONAL GEOGRAPHIC #ad - 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.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.
More information #ad
A tumbler that's made to last - the durable motor allows you to tumble multiple batches of rocks. 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. 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.
Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | Discover with Dr. Cool #ad |
Height | 9 Inches |
Length | 7.5 Inches |
Weight | 4 Pounds |
Width | 11 Inches |
Part Number | NGTUMBLER2 |
Model | NGTUMBLER2 |
Warranty | 30 day warranty against manufacturer defects |
More information #ad
4. NATIONAL GEOGRAPHIC
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Comes with 4 grades of Grit, NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit, Gemstone Mix of 9 varieties including Tiger's Eye, Jewelry Fastenings and detailed Learning Guide, Amethyst and Quartz
#adNATIONAL GEOGRAPHIC #ad - Transform your stones from rough rocks to dazzling gemstones! Create custom jewelry from your newly polished gemstones! . 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.Gemstones of 9 varieties - tiger's eye, agate, Dalmatian Jasper, Sodalite, Red Jasper, aventurine, Rose Quartz, Amethyst, Hematite.
More information #ad
Detailed learning guide - Our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts. Four grades of grit - coarse, medium, fine, polish. Jewelry fastenings - 1 necklace, 1 set of earrings, 1 keychain, 1 ring.1lb in total.Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | JMW Sales, Inc. #ad |
Height | 8 Inches |
Length | 3 Inches |
Weight | 1 Pounds |
Width | 3 Inches |
Part Number | NGGEMREFILL |
Model | NGGEMREFILL |
Warranty | No Warranty |
More information #ad
5. NATIONAL GEOGRAPHIC
#ad
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit – Durable Leak-Proof Rock Polisher with 7-Day Timer – Complete Rock Tumbling Kit – Geology Hobby for Kids, Educational STEM Science Kit, Rock Collection
#adNATIONAL GEOGRAPHIC #ad - Use gemfoam for dazzling results - this rock tumbling 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! 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.Create your own gemstones - rock tumbling is a hugely popular hobby for kids and adults! This robust rock polisher makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.
More information #ad
An improved, leak-proof barrel features a stainless-steel lid. A tumbler that's made to last - the durable motor has time and speed control settings so you can set it, and forget it. All-in-one tumbling kit - you get 1/2 pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, tumbler grit, a strainer, and our innovative GemFoam polishing foam.
Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | JMW Sales, Inc. #ad |
Height | 8.15 Inches |
Length | 13.86 Inches |
Width | 5.04 Inches |
Part Number | NGHOBBYTUMBLER2 |
Model | NGHOBBYTUMBLER2 |
More information #ad
6. NATIONAL GEOGRAPHIC
#ad
Grit, Noise-Reduced Barrel, NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit, Rock Polisher for Kids & Adults, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit
#adNATIONAL GEOGRAPHIC #ad - Learn all about the gemstones in your kit with the detailed, and rough gemstones, sifter, full-color learning guide. Easy to use – simple instructions and one-touch settings make rock tumbling fun and easy. A tumbler that's made to last – our high-quality tumblers are made with a durable motor that’s designed to last for years.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.
More information #ad
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. 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. In addition to the tumbler, four polishing grits, this bundle includes refill packs with 1lb each of rough gemstones and rough jasper. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. All-in-one tumbling kit - this complete kit has everything you need to create polished gemstones. Makes an excellent STEM gift or activity for girls and boys.
Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | JMW Sales, Inc. #ad |
Height | 14.96 Inches |
Length | 6.7 Inches |
Width | 11.8 Inches |
Part Number | NGHOBBYBUN |
Model | NGHOBBYBUN |
More information #ad
7. NATIONAL GEOGRAPHIC
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NATIONAL GEOGRAPHIC Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 1.5 Pounds of Ceramic Pellets, 4 Stage Bulk Rock Tumbler Grit, GemFoam Polishing Tumbling Media
#adNATIONAL GEOGRAPHIC #ad - 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.The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results. Quality grit results in a 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.
More information #ad
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. Just add the patent-pending rock polishing media 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. Brand new way to make tumbled rocks shine – gemfoam is a unique new rock polisher media that gives unprecedented shine to tumbled rocks.
Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | JMW Sales, Inc. #ad |
Height | 5.51 Inches |
Length | 7.48 Inches |
Width | 5.31 Inches |
Part Number | NGFOMCERGRIT |
Model | NGFOMCERGRIT |
More information #ad
8. NATIONAL GEOGRAPHIC
#ad
4 Grades of Grit, Jewelry Fastenings & Detailed Learning Guide, 3lbs Gemstones of 9 Varieties Including Tiger's Eye, Amethyst & Quartz, NATIONAL GEOGRAPHIC Rock Tumbler Mega Refill Kit
#adNATIONAL GEOGRAPHIC #ad - Create custom jewelry from your newly polished gemstones! 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.Gemstones of nine varieties: tiger’s eye, Agate, Rose Quartz, Red Jasper, amethyst, Aventurine, Dalmatian Jasper, Sodalite, Black Jasper.
More information #ad
Transform your stones from rough rocks to dazzling gemstones! Learning guide: our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts. Jewelry fastenings: 1 necklace, 1 Keychain, 1 set of Earrings, 1 Ring.3lb in total. Four grades of grit: coarse, Medium, Fine, Polish.Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | JMW Sales, Inc. #ad |
Height | 3 Inches |
Length | 3 Inches |
Width | 8 Inches |
Part Number | NGGEMREFILLMEGA |
Model | NGGEMREFILLMEGA |
Warranty | National Geographic Toys is proud to provide a 100% satisfaction with all our products so that you can buy with confidence. |
More information #ad
9. NATIONAL GEOGRAPHIC
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National Geographic Rock Tumbler Jasper Refill Kit, Educational Rock Polishing Hobby Kit with Gemstones & Grit, Jewellery Settings and Learning Guide Multicolor,23228
#adNATIONAL GEOGRAPHIC #ad - Craft your own unique jewellery using the 5 included jewellery fastenings, and make stunning homemade gifts for your friends and family! Full-colour learning guide with cool facts about the gemstones included, and easy to follow rock tumbling instructions.Create beautifully polished gemstones by tumbling the 8 varieties of raw jasper in your National Geographic Rock Tumbler sold separately.
More information #ad
1lb of raw gemstones: each refill kit comes with 1lb 453g of rough rocks to keep you tumbling for weeks and weeks! 5 4 grades of polishing grit: From coarse to fine, to incrementally refine your gems to perfection with each tumble.Brand | NATIONAL GEOGRAPHIC #ad |
Manufacturer | National Geographic #ad |
Height | 3 Inches |
Length | 8 Inches |
Width | 3 Inches |
Part Number | JM20403 |
Model | 23228 |
More information #ad
10. NATIONAL GEOGRAPHIC
#ad
And a Gemstone Dig Kit!, 10 Break Your Own Geodes, The Ultimate Bundle for Any Rock Lover By National Geographic, Includes Rock Tumbler Kit
#adNATIONAL GEOGRAPHIC #ad - This amazing collection is sure to impress any rock hound. Tons of extras - each kit is packed full of fun extras including rough rocks for tumbling, safety goggles, display stands, adventure guides and lots more.More information #ad
Everything is included! these kits are complete stand alone items that come with everything you need to grow an awesome rock collection. This bundle comes with National Geographic's 100% Satisfaction Guarantee. Comes with national geographic's best selling Rock Tumbler, Gemstone Dig Kit, and Geode Crystal Set.Brand | NATIONAL GEOGRAPHIC #ad |
More information #ad