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The sheer number of options out there makes going through thousands of reviews extremely frustrating. Look over the reviews, then make an informed purchasing decision based on this ultimate guide.

10 Best smithsonian rock tumbler refill kit Reviews in 2021

Bestseller No. 1
NATIONAL GEOGRAPHIC Rock Tumbler Grit - 3.28 Pounds Rock Polishing Grit Media, Works with any Rock Tumbler, Rock Polisher, Stone Polisher, Polishes 8-10 Pounds of Rocks
  • 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 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
  • 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
Bestseller No. 2
NATIONAL GEOGRAPHIC Rock Tumbler Kit-3LB Extra Large Capacity, 3LB Rough Gemstones 4 Polishing Grits, Jewelry Fastenings, an Educational STEM Science Kit
  • 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.
SaleBestseller No. 3
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit
  • 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. 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.
Bestseller No. 4
NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Rock Polisher for Kids and Adults, Complete Rock Tumbler Kit, Durable Leak-Proof Tumbler, Rocks, Grit, and 5 Jewelry Fastenings, A Great STEM Hobby
  • 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.
Bestseller No. 5
Tonmp 3 Pounds Rock Tumbler Refill Grit Media Kit (4 Polishing Grits)| 4-Steps for Tumbling Stones
  • 4-Step grit pack with 3 pounds of total weight. Our universal grit is designed for any rock tumbler.
  • Step 1 - 1 lb. 60 Coarse Silicon Carbide Grit, Step 2 - 1 lb. 180/220 Medium Silicon Carbide Grit, Step 3 - 1/2 lb. 500 Fine Silicone Carbide, Step 4 - 1/2 lb. 1200 Aluminum Oxide Polish.
  • Packaged in 4 bottle to safely store unused product for later.
  • The kits Will work with all rock tumbler.Makes high quality rock tumblers and materials.
  • Purchase with confidence. We proudly back our product with a 100% satisfaction guarantee
Bestseller No. 6
Dan&Darci Mega Rock Tumbler Refill Kit - 9 Varieties of Gems - 0.5 lb, 4 Grit Levels, Jewelry Fasteners, Compatible with All Tumblers Rock Tumbling Supplies
  • Mega rock tumbler refill pack: Includes everything needed to turn rough rocks into beautiful gemstones. Includes 1/2 lb. assorted gemstones, 4 grit bags, jewelry fasteners. Compatible with all rock tumblers.
  • 9 varieties of gems (0.5 LB): Includes Agate, Amethyst, Aventurine, Dalmatian Jasper, Hematite, Red Jasper, Rose Quartz, Sodalite, Tiger Eye.
  • 4 grit levels: Grade 1: Coarse, Grade 2: Medium, Grade 3: Pre-polish, and Grade 4: Polish.
  • Compatible with all rock tumblers: Can be used in tumblers from any brand: Dan&Darci, Elenco, Lortone, National Geographic, Smithsonian, Thumler, and more.
  • 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.
Bestseller No. 7
Rockhound's 1st Choice Rock Tumbler Gem Refill Kit -Mexico Blue Quartz Rough- 8oz
  • Blue Quartz From Mexico .Great Refill for the Beginner hobbyist, or advanced Tumble
  • Your stones will be typical of what is shown. Pieces shown are actual random examples of this Parcel & Gem's colorization.
  • Takes a nice Polish, each rough stone ranges roughly from 1" dia to 1 1/2" dia.
  • Each Bag Averages 5-7 Chunky, Pieces-Nice details on many! Gemmy BLUE color on all. You will Be Very Happy!
  • A Limited Quality Offering from Rockhound's 1st Choice
Bestseller No. 8
MJR Tumblers Refill Grit Kit for 15 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish
  • 16 ounces (1 pound) of 60/90 Graded Silicon Carbide Grit (Step 1)
  • 16 ounces (1 pound) of 120/220 Graded Silicon Carbide Grit (Step 2)
  • 8 ounces (1/2 pound) of 500/600 Graded Silicon Carbide Grit (Step 3)
  • 8 ounces (1/2 pound) of 1200 Aluminum Oxide Polish (Step 4)
SaleBestseller No. 9
NATIONAL GEOGRAPHIC Rock Tumbler Mega Refill Kit - 3lbs Gemstones of 9 Varieties Including Tiger's Eye, Amethyst & Quartz - 4 Grades of Grit, Jewelry Fastenings & Detailed Learning Guide
  • 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!
  • JEWELRY FASTENINGS: 1 Necklace, 1 set of Earrings, 1 Keychain, 1 Ring. Create custom jewelry from your newly polished gemstones!
  • LEARNING GUIDE: Our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts
  • 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
Bestseller No. 10
NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Gemstone Mix of 9 varieties including Tiger's Eye, Amethyst and Quartz - Comes with 4 grades of Grit, Jewelry Fastenings and detailed Learning Guide
  • Gemstones of nine varieties: tiger's eye, amethyst, Aventurine, rose quartz, red jasper, agate, Sodalite, Dalmatian jasper, hematite. (1lb in total)
  • Four grades of grit: Coarse, medium, fine, polish. Transform your stones from rough rocks to dazzling gemstones!
  • Jewelry fastenings: 1 necklace, 1 set of earrings, 1 keychain, 1 ring. Create custom jewelry from your newly polished gemstones!
  • Learning guide: our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts
  • Respected quality - NATIONAL GEOGRAPHIC is proud to provide only the highest quality toys and all our kits are backed by our 100% satisfaction guarantee

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Final Word

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