






💎 Elevate your rock tumbling game—shine brighter, polish smarter!
National Geographic’s GemFoam is a revolutionary reusable foam media designed to add an unprecedented shine to tumbled rocks. Compatible with any rock tumbler, it’s used after the final grit cycle to polish stones over 3 days. Each 30g pack lasts up to 6 polishing cycles and includes a mesh storage bag for easy cleanup. Developed by award-winning Blue Marble, this product combines STEM education with hands-on creativity for rock enthusiasts aged 8 and up.





| Product Dimensions | 11.99 x 3 x 18.49 cm; 35 g |
| Manufacturer recommended age | 8 years and up |
| Item model number | NGFOMBAG |
| Educational Objective(s) | STEM Skill |
| Number of Game Players | 1 |
| Assembly Required | No |
| Batteries Required? | No |
| Batteries Included? | No |
| tech_spec_battery_description_toys | No batteries required |
| Material Type(s) | Foam |
| Remote Control Included? | No |
| Color | Black |
| Release date | 15 July 2020 |
| ASIN | B08B7DJTCR |
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