DOWNLOAD THE APP
Customer Services
Copyright © 2025 Desertcart Holdings Limited
DOWNLOAD THE APP
💎 Transform rough stones into dazzling gems—because your collection deserves the best polish!
The Blue Marble National Geographic Rock Tumbler Grit Bulk Pack offers a high-quality, four-stage silicon carbide grit system designed to polish 8-10 pounds of rocks, gems, and glass. Compatible with all rock tumblers, it includes a precise 10 mL scoop and secure storage containers, delivering professional-grade results backed by National Geographic’s trusted STEM brand.
| ASIN | B01MRKI4W0 |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | Yes |
| Best Sellers Rank | #59,854 in Kitchen ( See Top 100 in Kitchen ) #807 in Tumblers & Water Glasses |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (13,593) |
| Date First Available | 12 January 2017 |
| Educational Objective(s) | Learn About Rock Tumbling |
| Item model number | NGBULKGRIT |
| Language | English |
| Manufacturer recommended age | 8 years and up |
| Material Type(s) | Carbide of Silicon |
| Number of Game Players | 1 |
| Product Dimensions | 13.97 x 13.97 x 10.8 cm; 1.78 kg |
| Radio Control Suitability | home |
| Remote Control Included? | No |
| tech_spec_battery_description_toys | No batteries required |
F**M
It helps shaping stones too..it is a little sound and I'm living 2floor so I put a box on it to make the noise more silent
L**E
Indispensable pour utiliser la polisseuse de mon fils. Il y a de quoi faire pour un moment.
A**X
El proceso de pulir piedras es algo largo, pero el producto hace su labor. Viene suficiente cantidad para varias tandas y es muy sencillo de usar, ya que cada paso esta numerado.
V**Z
As advertised
D**L
4 Körnungen für das erfolgreiche Polieren von Steinen. Es funktioniert wirklich… braucht aber Geduld. Die Steine sehen nach 14 Tagen ganz gut aus aber ich denke da muss noch mal eine Woche in der Trommen poliert werden.
Trustpilot
1 month ago
2 weeks ago