20 Best Rock Tumbler Jewelry Kit [2022]

Are you looking for the best rock tumbler jewelry kit? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling rock tumbler jewelry kit.

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1 NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Gemstone Mix of 9 varieties including Tiger's Eye,... NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Gemstone Mix of 9 varieties including Tiger's Eye,...
2 NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry... NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry...
3 NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit – Durable Leak-Proof Rock Polisher with 7-Day Timer –... NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit – Durable Leak-Proof Rock Polisher with 7-Day Timer...
4 NATIONAL GEOGRAPHIC Rock Tumbling Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing... NATIONAL GEOGRAPHIC Rock Tumbling Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4...
5 VIYUKI Rock Stone Tumbler Machine- Double Drum 6LB Lapidary Polisher for Kids Adults (Double... VIYUKI Rock Stone Tumbler Machine- Double Drum 6LB Lapidary Polisher for Kids Adults (Double...
6 Dan&Darci Mega Rock Tumbler Refill Kit - 9 Varieties of Gems - 0.5 lb, 4 Grit Levels, Jewelry... Dan&Darci Mega Rock Tumbler Refill Kit - 9 Varieties of Gems - 0.5 lb, 4 Grit Levels, Jewelry...
7 WireJewelry Single Barrel Rotary Tumbler, Jewelry and Metal Polishing Kit, Includes 1 Pound of... WireJewelry Single Barrel Rotary Tumbler, Jewelry and Metal Polishing Kit, Includes 1 Pound of...
8 NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete... NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids -...
9 Nature Bound Starter Rock Tumbler Kit for Kids– Includes Rough Gemstones, Polishing Grits, Jewelry... Nature Bound Starter Rock Tumbler Kit for Kids– Includes Rough Gemstones, Polishing Grits,...
10 NATIONAL GEOGRAPHIC Rock Tumbler Mega Refill Kit - 3lbs Gemstones of 9 Varieties Including Tiger's... NATIONAL GEOGRAPHIC Rock Tumbler Mega Refill Kit - 3lbs Gemstones of 9 Varieties Including...
11 WireJewelry Single Barrel Rotary Rock Tumbler Madagascar Mix Deluxe Kit, Includes 3 Pounds of Rough... WireJewelry Single Barrel Rotary Rock Tumbler Madagascar Mix Deluxe Kit, Includes 3 Pounds of...
12 BestEquip Jewelry Polisher Tumbler 3kg 6.6Lbs Capacity Jewelry Polishing Finishing Machine 45W Mini... BestEquip Jewelry Polisher Tumbler 3kg 6.6Lbs Capacity Jewelry Polishing Finishing Machine 45W...
13 NATIONAL GEOGRAPHIC Hobby Rock Tumbler Includes 1lb Rough Gemstones, 4-Stage Polishing Grit,... NATIONAL GEOGRAPHIC Hobby Rock Tumbler Includes 1lb Rough Gemstones, 4-Stage Polishing Grit,...
14 Raw Opal Crystals - Genuine Natural AAA Grade Opal Gram Lot, Reiki Crystals and Healing... Raw Opal Crystals - Genuine Natural AAA Grade Opal Gram Lot, Reiki Crystals and Healing...
15 Collecting Rocks, Gems and Minerals: Identification, Values and Lapidary Uses Collecting Rocks, Gems and Minerals: Identification, Values and Lapidary Uses
16 My Book of Rocks and Minerals: Things to Find, Collect, and Treasure My Book of Rocks and Minerals: Things to Find, Collect, and Treasure
17 Weiman Jewelry Cleaner Liquid “ Restores Shine and Brilliance to Gold, Diamond, Platinum... Weiman Jewelry Cleaner Liquid “ Restores Shine and Brilliance to Gold, Diamond, Platinum...
18 Wire-Wrapped Jewelry Techniques: Tools and Inspiration for Creating Your Own Fashionable Jewelry... Wire-Wrapped Jewelry Techniques: Tools and Inspiration for Creating Your Own Fashionable Jewelry...
19 Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings -... Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings -...
20 PAGOW 100pcs Spiral Bead Cages Pendants, Crystal Holder for Stones with Small Hoop Silver Plated,... PAGOW 100pcs Spiral Bead Cages Pendants, Crystal Holder for Stones with Small Hoop Silver Plated,...
Bestseller No. 1
NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Gemstone Mix of 9 varieties including Tiger's Eye,...
  • GEMSTONES OF 9 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!
  • DETAILED 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...
Bestseller No. 2
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry...
  • 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...
  • 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...
  • A COMPLETE HOBBY TUMBLING KIT - Everything you need to create polished gemstones: the tumbler, four polishing grits, sifter, nine types of real rough...
  • 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...
  • HIGH-QUALITY EDUCATIONAL TOYS - National Geographic is proud to make the highest quality hands-on science toys, and all our products are backed by...
Bestseller No. 3
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit – Durable Leak-Proof Rock Polisher with 7-Day Timer –...
  • 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...
  • 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...
  • 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...
  • USE GEMFOAM FOR DAZZLING RESULTS - This rock tumbling kit stands apart from others thanks to our new, reusable GemFoam rock polisher! Add GemFoam and...
  • HIGH-QUALITY EDUCATIONAL TOYS - National Geographic is proud to make the highest quality hands-on science toys, and all our products are backed by...
Bestseller No. 4
NATIONAL GEOGRAPHIC Rock Tumbling Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing...
  • 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...
  • 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...
  • 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...
  • USE GEMFOAM FOR DAZZLING RESULTS - This rock polishing kit stands apart from others thanks to our new, reusable GemFoam rock polisher! Add GemFoam and...
  • SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your...
Bestseller No. 5
VIYUKI Rock Stone Tumbler Machine- Double Drum 6LB Lapidary Polisher for Kids Adults (Double...
  • ✅EASY TO CREATE YOUR GEMSTONES - Rock tumblers for kids are a fantastic and exciting activity for children of all ages. Easy operation and durable...
  • ✅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....
  • ✅COMPLETE ROCK TUMBLER KIT –Rock tumbler for adults, Includes rock stone tumbler base, Replacement tumbler belt(5pc), 6-pound capacity barrel for...
  • ✅6LB ROCK TUMBLER EASY TO USE – Simple hobby rock tumbler kit and one-touch settings make rock tumbling fun and easy. Control the number of days...
  • ✅A FUN AND EDUCATIONAL GIFT: Rough gemstones for a rock tumbler, Make any stone sparkle, and polish everyday rocks into dazzling gemstones! It...
Bestseller No. 6
Dan&Darci Mega Rock Tumbler Refill Kit - 9 Varieties of Gems - 0.5 lb, 4 Grit Levels, Jewelry...
  • Mega rock tumbler refill pack: Includes everything needed to turn rough rocks into beautiful gemstones. Includes 1/2 lb. assorted gemstones, 4 grit...
  • 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...
  • 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...
Bestseller No. 7
WireJewelry Single Barrel Rotary Tumbler, Jewelry and Metal Polishing Kit, Includes 1 Pound of...
  • Professional Grade Single Barrel Rotary Rock Tumbler with Leak Proof Rubber Barrel to Minimize Noise
  • Powerful 120 Volt Motor Designed to Operate 24/7 for Years
  • 2 Year Manufacturer Warranty and Lifetime Belt Replacement Warranty
  • 1 Pound of Jewelers Mix Stainless Steel Shot
  • 8 Ounces of Shinebrite Burnishing Compound
Bestseller No. 8
NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete...
  • 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...
  • 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...
  • 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...
  • EASY TO USE AND EDUCATIONAL - Detailed tumbler instructions lead you step-by-step through the rock tumbling process, A full-color learning guide...
  • SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your...
Bestseller No. 9
Nature Bound Starter Rock Tumbler Kit for Kids– Includes Rough Gemstones, Polishing Grits, Jewelry...
  • FAST – Our unique design means a faster gemstone polish experience. Polish stones in half the time!
  • COMPLETE KIT – Includes rock tumbler, power cord, 3 types of unpolished gemstones, polishing powder, and easy to follow instructions
  • NO LEAK – Our rock tumbler securely fastens and does not leak like so many others
  • EASY TO USE – All ages and skill levels can get started quickly and easily; 100% Satisfaction
  • AUTHENTIC NATURE BOUND BRAND - The finest nature toys available - guaranteed!
Bestseller No. 10
NATIONAL GEOGRAPHIC Rock Tumbler Mega Refill Kit - 3lbs Gemstones of 9 Varieties Including Tiger's...
  • GEMSTONES OF NINE VARIETIES: Tiger’s Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Black Jasper. (3lb in...
  • 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...
Bestseller No. 11
WireJewelry Single Barrel Rotary Rock Tumbler Madagascar Mix Deluxe Kit, Includes 3 Pounds of Rough...
  • Professional Grade Single Barrel Rotary Rock Tumbler with Leak Proof Rubber Barrel to Minimize Noise
  • Powerful 120 Volt Motor Designed to Operate 24/7 for Years
  • 2 Year Manufacturer Warranty and Lifetime Belt Replacement Warranty
  • 3 Lbs Madagascar Stone Mix; Average Size: 1.5" to 2" with 20-30 Gram Weight
  • 2 Batches of Premeasured Grit & Polish (Coarse, Medium, Pre-Polish, Final Polish & Plastic Pellets)
Bestseller No. 12
BestEquip Jewelry Polisher Tumbler 3kg 6.6Lbs Capacity Jewelry Polishing Finishing Machine 45W Mini...
  • Durable & Reliable Material: The 5 kg rotary tumbler, made of tough polycarbonate, has the leak-proof function and long service life. Roller Capacity:...
  • Powerful Performance: Take the principle of centrifugal motion, high-efficiency polishing, improve work efficiency 5 to 10 times. This jewelry tumbler...
  • Flexible Adjustment: The jewelry polisher tumbler with bidirectional rotation and 5 speeds & timer from 10-60 minutes. The working time and speed can...
  • User-Friendly Design: The tightly designed buckle has good airtightness, worry-free. The bottom of the jewelry tumbler machine adopts wear-resistant...
  • Various Application: Ideal for jewelry, steel, iron, copper, zinc, aluminum, magnesium alloy materials such as surface polishing, chamfering,...
Bestseller No. 13
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Includes 1lb Rough Gemstones, 4-Stage Polishing Grit,...
  • A COMPLETE HOBBY TUMBLING KIT - Everything you need to create polished gemstones: the tumbler, four polishing grits, sifter, nine types of real rough...
  • 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...
  • 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...
  • SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your...
  • Power source type: Electrical Plug
SaleBestseller No. 14
Raw Opal Crystals - Genuine Natural AAA Grade Opal Gram Lot, Reiki Crystals and Healing...
  • Mined From : These fire striking opals are directly mined from Ethiopia.
  • QUANTITY - You will receive ONE (1) 5 to 250 gram lot of Opal crystals.
  • Characteristic: Opal acts as a prism within the aura, bringing a full spectrum of Light energy to the system, soothing and clearing the emotional...
  • FREEDOM - Opal encourages original ideas and creative thinking which can help open one to new ways of viewing the world.
  • S LOYALTY - Wearing or carrying this gemstone brings loyalty, faithfulness and spontaneity.
SaleBestseller No. 15
Collecting Rocks, Gems and Minerals: Identification, Values and Lapidary Uses
  • Polk, Patti (Author)
  • English (Publication Language)
  • 352 Pages - 05/04/2016 (Publication Date) - Krause Publications (Publisher)
Bestseller No. 16
My Book of Rocks and Minerals: Things to Find, Collect, and Treasure
  • Amazon Kindle Edition
  • Dennie, Devin (Author)
  • English (Publication Language)
  • 07/11/2017 (Publication Date) - DK Children (Publisher)
Bestseller No. 17
Weiman Jewelry Cleaner Liquid “ Restores Shine and Brilliance to Gold, Diamond, Platinum...
  • Gentle Formula – Weiman Jewelry Cleaner contains a mixture of surfactants, ammonia and ch-elating agent to remove dirt and restore shine without...
  • Effective Tarnish Remover - This product uses the finest ingredients to quickly remove gunk, tarnish, soap residue, goo and grime from your jewelry,...
  • Easy to Use - Almost everything you need is included with this product, the tray and liquid to clean your jewelry is built-in; all you need is a...
  • Professional Clean - In a matter of minutes your jewelry will look like it was cleaned by a professional
  • Should not be used on coral, ivory, amber, malachite, pearls, opals, jade or turquoise
SaleBestseller No. 18
Wire-Wrapped Jewelry Techniques: Tools and Inspiration for Creating Your Own Fashionable Jewelry...
  • Lora S. Irish (Author)
  • English (Publication Language)
  • 176 Pages - 09/10/2018 (Publication Date) - Fox Chapel Publishing (Publisher)
SaleBestseller No. 19
Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings -...
  • 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...
  • Complete kit: Includes: rock tumbler machine, low-noise barrel (1 lb. capacity), 4 grit packets, 1/2 lb. assorted rough rocks, mesh strainer, jewelry...
  • 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...
  • Advanced features: Includes speed controls (providing more granular tumbling results), a 9-day timer (shuts off automatically when you desire), all...
  • 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...
Bestseller No. 20
PAGOW 100pcs Spiral Bead Cages Pendants, Crystal Holder for Stones with Small Hoop Silver Plated,...
  • Package Include: You will receive 100 pieces crystal pendants with the top loop in 4 sizes, which include 40 pieces in 0.35 x 0.49inches (9 x 13mm),...
  • Material: These spiral bead cages pendants are made of alloy silver plating and using electroplating process, which is soft, stretchable and durable,...
  • Easy to Use: The spiral bead cage is easy to stretch and recover, you can separate them easily and then insert wool ball, lava bead, gems, hair balls...
  • Wide Application: These spiral bead cages come in multiple sizes, are suitable for making necklaces, bracelets, anklets, key chains, sweater chains,...
  • DIY Gift: A good gift for birthday party favors, mini treasure toy gifts, halloween and christmas party. Perfect for necklace, bracelet, dangle,...

Having trouble finding a great rock tumbler jewelry kit?

This problem is well understood by us because we have gone through the entire rock tumbler jewelry kit research process ourselves, which is why we have put together a comprehensive list of the best rock tumbler jewelry kits available in the market today.

After hours of searching and using all the models on the market, we have found the best rock tumbler jewelry kit for 2022. See our ranking below!

How Do You Buy The Best Rock Tumbler Jewelry Kit?

Do you get stressed out thinking about shopping for a great rock tumbler jewelry kit? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching rock tumbler jewelry kit, which is why we have assembled a comprehensive list of the greatest rock tumbler jewelry kit available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for rock tumbler jewelry kit that you consider buying. Your questions might include the following:

  • Is it worth buying an rock tumbler jewelry kit?
  • What benefits are there with buying an rock tumbler jewelry kit?
  • What factors deserve consideration when shopping for an effective rock tumbler jewelry kit?
  • Why is it crucial to invest in any rock tumbler jewelry kit, much less the best one?
  • Which rock tumbler jewelry kit are good in the current market?
  • Where can you find information like this about rock tumbler jewelry kit?

We’re convinced that you likely have far more questions than just these regarding rock tumbler jewelry kit, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for rock tumbler jewelry kit, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible rock tumbler jewelry kit. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an rock tumbler jewelry kit buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available rock tumbler jewelry kit currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of rock tumbler jewelry kit has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an rock tumbler jewelry kit?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your rock tumbler jewelry kit.
  5. Customer Ratings: Number ratings grade rock tumbler jewelry kit objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their rock tumbler jewelry kit.
  7. Product Quality: You don’t always get what you pay for with an rock tumbler jewelry kit, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an rock tumbler jewelry kit is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining rock tumbler jewelry kit information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding rock tumbler jewelry kit is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: What is the best rock tumbler to buy?

A: Tru-square Metal Products – EDITOR’S CHOICE. Topping our list of the best rock tumblers is the Tru-Square Metal Tumbler. … Lortone 3A Deluxe Rock Tumbler Kit – Runner Up. Lortone 3A is yet another fantastic rock tumbler worthy of your attention. … NATIONAL GEOGRAPHIC Professional Rock Tumbler – Best for the Money. …

Q: How to make rocks shiny without a rock tumbler?

A: without being artificial or overbearing – remember, the best tonics are supporting acts, making whatever spirit you pair with it shine. Finally, we opted to evaluate brands as a whole because …

Q: How to choose a rock tumbler?

A: – For 50 lbs. or less rock per year, I recommend the model QT6. – To tumble 50-120 lbs of rock per year I recommend the model QT12, QT66. … – If you’re planning on tumbling over 120 lbs. of rock per year you will need a commercial-grade tumbler, see question #4

Q: Where to buy a rock tumbler?

A: Where to buy rock tumbling supplies? I like to buy my supplies from amazon.com. However, you can also get your supplies from sites like rocktumbler.com or therockshed.com. What is rock tumbling grit made of? Rock tumbler grit comes in many forms, but the most common are silicon carbide and aluminum oxide.