💎 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 |
| Age Range Description | 14 years and up |
| Best Sellers Rank | #23,905 in Kitchen ( See Top 100 in Kitchen ) #311 in Tumblers & Water Glasses |
| Brand Name | Blue Marble |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 13,570 Reviews |
| Educational Objective | Learn About Rock Tumbling |
| Global Trade Identification Number | 00816448020636 |
| Included Components | 10 mL Grit Scoop, 4 Stages of Rock Polishing Grit, Rock Tumbling Instructions |
| Item Dimensions | 14 x 14 x 10.8 centimeters |
| Item Type Name | with any Rock Tumbler, Rock Polisher, Stone Polisher, Polishes 8-10 Pounds of Rocks |
| Item Weight | 1.78 Kilograms |
| Item height | 4.25 inches |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 96.0 |
| Material Type | glass, glass quartz glass carbide |
| Number of Players | 1 |
| Operation Mode | Manual |
| Power Source | battery_powered |
| Size | M |
| Sub Brand | NATIONAL GEOGRAPHIC |
| Subject Character | no subject character |
| Supported Battery Types | No batteries required |
| Theme | Science |
| UPC | 816448020636 |
| Unit Count | 1.0 Count |
F**M
Helps Poshing
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
Parfait !
Indispensable pour utiliser la polisseuse de mon fils. Il y a de quoi faire pour un moment.
A**X
Muy satisfecha
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
Good product
As advertised
D**L
Poliermittel für den Tumbler…
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
1 week ago
