KomeStone Professional Rock Polisher Tumbler Kit, Black, 2.5 lb barrel, 3-speed motor, 9-day timer
KomeStone Professional Rock Polisher Tumbler Kit, Extra Large 2.5 lb Barrel, 3-Speed Motor, 9-Day Timer, Includes Rough Gemstones, 4 Polishing Grits, 3 Belts, K1220726000
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KomeStone

KomeStone Professional Rock Polisher Tumbler Kit, Extra Large 2.5 lb Barrel, 3-Speed Motor, 9-Day Timer, Includes Rough Gemstones, 4 Polishing Grits, 3 Belts, K1220726000

134 ratings

Key item features

  • Durable Construction: Features a super high-quality motor and a thickened, tier-level rubber barrel, designed for lasting durability and includes three protections against water leakage.
  • Complete Kit: An all-in-one set including a 2.5 lb capacity tumbler, 1 lb of 9 types of rough gemstones, 4 polishing grits, 3 belts, ceramic contact media, sifter, screwdriver, jewelry fastenings, and a tutorial guide.
  • Generous Capacity: The extra-large barrel accommodates up to 2.5 pounds of rocks, allowing for more items to be tumbled simultaneously.
  • Comprehensive Guidance: Comes with a full-color instruction and learning guide, making the tumbling process easy for both beginners and experienced users.
  • Curated Gemstones: Includes approximately 1 lb of carefully selected and hand-packed rough real gemstone rocks of 9 different types, varying in size and number.
  • Detailed Record-Keeping: Provides a tumbling log within the learning book to help users track their progress and maintain a history of their tumbling cycles.
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Specs

Volume capacity, 2.5 lbRock tumbler type, Rotary Rock TumblersPower type, Corded ElectricBrand, KomeStoneMaterial, RubberItems included, 3 Belts, Rough Gemstones, 4 Polishing Grits, Great Stem Science Gift

About this item

Product details

A diamond in the rough? Turn ordinary rocks into beautifully polished gemstones with our KomeStone Rock Tumbler Kit. This tumbler kit is a great way to get kids, and adults alike, introduced to the popular habit of rock tumbling. And it's so easy to use—just insert rocks (one-pound bag included, or select your own small rocks), polishing grit, and water into the barrel; attach it to the tumbler base; and plug in the tumbler. With a little bit of patience, and a lot of anticipation, children will be amazed at the dazzling results! Turn them into beautiful pieces of jewelry, glue them on a picture frame or Christmas ornament, or add them as accents in potted plants.

    • THE ONLY TUMBLER YOU NEED: Built in with the super high quality motor and thicken tier level rubber barrel, both are super durable for lasting for years, three protections for water leakage is an extra big plus for years of use.
    • ALL IN ONE HOBBY & EDUCATIONAL TUMBLING KIT: Our KomeStone rock tumbler kit has everything that need for tumbling, including 1LB for 9 types of real rough gemstone rocks, the tumbler and the barrel, 3 belts and 4 polishing grits and ceramic contact media, sifter, screwdriver, Jewelry Fastenings, and illustrated tutorial guide. It's is a very decent and perfect gift for both children and adults!
    • EXTRA LARGE ROCK CAPABILITY FOR 2.5LBS: The Maximum rocks for this barrel is 2.5LB. This KomeStone rock tumbler allows to tumble more rocks each time.
    • TUTORIAL GUIDE FROM BEGINNERS TO EXPERTS: Make tumbling easy! We created this Instruction & Learning Guide with full-color contents for both beginners and experts.
    • STRICTLY INSPECT ALL ROCKS THOROUGHLY: Carefully selected and hand-packed. 9 types of rough real gemstone rocks are in different size or numbers, weights appr. 1lb. Rocks are inside of the barrel.
    • INSTRUCTIONS ARE CLEAR AND EASY TO FOLLOW: With step by step Instruction & Learning Guide with full-color contents for both beginners and experts, easy to understand and set up.
    • TUMBLING RECORDS FOR EACH CHCLE: To help you with your record keeping, and keep you on track and provide a history that will help you learn, we have prepared a tumbling log at the end of this learning book.

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Specifications

Volume capacity

2.5 lb

Rock tumbler type

Rotary Rock Tumblers

Power type

Corded Electric

Brand

KomeStone

Warranty

Warranty information

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Warnings

Customer ratings & reviews

4.3 out of 5 stars
stars
134 ratings47 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars66% (89)
  2. 4 stars14% (19)
  3. 3 stars7% (10)
  4. 2 stars4% (5)
  5. 1 star8% (11)

Reviews summary

Pros

  • : Setup and instructions are easily understandable.
  • : Suitable for those new to the product.
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Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
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Showing 1-3 of 47 reviews

Jul 4, 2026
Reviewer name: Connie
Sold byNano Shield StoreDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Everything included even rocks to start

I purchased this for my grandson for his 12th birthday. He immediately set it up and began tumbling rocks. Everything was in there that he needed to start using it. The instructions were easy to understand. He is excited to make something for me. This kit also includes some jewelry to use the stones in. He is very excited.

Helpful?2DGX6XYSAI5E1241888321
May 28, 2026
Reviewer name: anonymous
Top Reviewer
Sold byNano Shield StoreDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

the great grandchildren love it. now they can make their own "shiny rocks"

Helpful?2DGX6XYSAI5E1241888321
Sep 13, 2025
Reviewer name: samantha
Top Reviewer
Sold byNano Shield StoreDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

great for rock collectors

its very sturdy and does a great job

Helpful?2DGX6XYSAI5E1241888321
Current price is $59.98
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