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💎 Turn rough stones into polished gems—and your downtime into a dazzling creative escape!
The Blue Marble National Geographic Hobby Rock Tumbler Kit is a robust, all-inclusive rock tumbling system featuring a durable motor with adjustable time and speed, a leak-proof stainless steel barrel, and a patented GemFoam polishing foam for superior shine. Perfect for beginners and hobbyists aged 8 and up, it includes one pound of rough rocks with nine gemstone types, tumbling grit, jewelry fastenings, and educational materials, making it a fun STEM activity that transforms raw stones into beautiful, polished gems.
| ASIN | B086Z6ZB7R |
| Age Range Description | 8 years and up |
| Battery Description | Not required (mains powered) |
| Best Sellers Rank | #28,200 in Kitchen ( See Top 100 in Kitchen ) #363 in Tumblers & Water Glasses |
| Brand Name | Blue Marble |
| Customer Reviews | 4.3 4.3 out of 5 stars (3,631) |
| Educational Objective | Geology and Creative Thinking |
| Included Components | 1/2lb rough rocks, 4 Stage Grit, Original GemFoam Polishing Media, toys |
| Is Assembly Required | No |
| Item Dimensions | 33.3 x 12.7 x 20.7 centimeters |
| Item Type Name | toys |
| Item Weight | 1.9 Kilograms |
| Language | English |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 120 |
| Manufacturer Minimum Age (MONTHS) | 12.0 |
| Manufacturer Part Number | NGHOBBYTUMBLER2 |
| Manufacturer Warranty Description | No Warranty |
| Material Type | Cotton |
| Model Number | NGHOBBYTUMBLER2 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Set Name | Hobby Rock Tumbler Kit |
| Size | One Size |
| Sub Brand | National Geographic |
| Theme | Geology |
| UPC | 816448028830 |
| Unit Count | 1 Count |
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