






✨ Elevate your rock game—shine like a pro, every time! ✨
Blue Marble National Geographic GemFoam is a reusable rock polishing foam designed to add exceptional shine to tumbled rocks after the final grit cycle. Compatible with any durable tumbler, it can be reused up to 6 times and requires up to 3 days of tumbling for optimal results. Packaged with a convenient mesh bag, it’s a must-have for hobbyists seeking professional-grade polish and STEM-backed quality.





| Item Dimensions | 4.72 x 1.18 x 7.28 inches |
| Size | Medium |
| Material Type | Foam |
| Color | Black |
| Theme | Geology |
| Operation Mode | Manual |
| Educational Objective | Science |
| Number of Players | 1 |
Trustpilot
2 months ago
2 months ago