KomeStone G1 4LB Professional Rock Tumbler Kit for Adults
- 4 lb rubber barrel, single barrel
- Brushless motor, 3 speeds
- 9 day timer with memory
- 1 lb of rough rocks, 9 types, 4 bags of grit
- Ages 13 and up, 1 year warranty
- 8 lb, 11.02 x 9 x 7.28 inches
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A complete rock tumbling kit with a metal base, a rubber barrel, rough rocks, grits and tools. It runs from an AC adapter and a screwdriver and belts are included for setup.
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ASIN: B0FDQLGLFQModel: KS0619RT82Category: Rock Tumblers
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Overview
A rock hobbyist or collector gets a brushless polisher on a heavy metal base with a rubber barrel for tumbling. The kit adds rough rocks, polishing grits, belts, jewelry fastenings and an illustrated user book.
Everything needed to start is in the box, from rocks to grits, so a first batch can begin without extra buying. The limitation is that only a single barrel is included, so one load runs at a time.
Who it's for
Teens and adults learning about geology and polishing stones. An indoor tabletop near an outlet is the setting. Anyone who wants to run several loads together should look at multi barrel models.
Pros and cons
- Brushless motor with three speeds
- Rocks, grits and tools included
- Heavy metal base
- Timer with memory
- Single barrel only
- Needs an electrical outlet
- Setup order not described
- Grit quantity not explained
Performance notes
A rubber barrel rotates the rocks against polishing grit, and the speed setting and timer decide how long each stage runs. The metal base reduces movement during long cycles. Polishing a load takes many days at this size, which is why a nine day timer is included.
Specifications
| Brand | KomeStone |
|---|---|
| Model | KS0619RT82 |
| Dimensions & fit | |
| Dimensions | 11.02 x 9 x 7.28 inches |
| Weight | 8 pounds |
| Capacity & performance | |
| Barrel | 4 lb, single rubber barrel |
| Power & efficiency | |
| Power source | AC adapter |
| Construction & materials | |
| Material | Metal base, stainless steel, rubber |
| Included components | |
| In the box | Metal base, barrel, 1 lb rough rocks (9 types), 4 bags of polishing grit, 2 belts, screwdriver, mesh strainer, jewelry fastenings, power adapter, user book, warranty card |
| Other details | |
| Motor | Brushless, 3 speeds |
| Timer | 9 day timer with memory |
| Recommended age | 13 years and up |
Frequently asked questions
How do I set up the KomeStone G1 rock tumbler?
The kit includes the metal base, barrel, two belts, a screwdriver and an illustrated user book. Follow the book for assembly and grit steps, since the listing gives no order.
What comes with the KomeStone G1 rock tumbler kit?
One pound of assorted rough rocks in nine types, four bags of polishing grit, a mesh strainer, jewelry fastenings and a power adapter come with it.
Does the KomeStone G1 run on batteries?
No. It uses an AC adapter and the listing says no batteries are required.