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💎 Transform rough stones into dazzling gems — polish like a pro!
The Blue Marble National Geographic Rock Tumbler Grit Bulk Pack offers a premium 4-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 with ease. Perfect for STEM enthusiasts and hobbyists seeking a high-quality, educational polishing experience.
| ASIN | B01MRKI4W0 |
| Age Range Description | 14 years and up |
| Best Sellers Rank | #36,312 in Kitchen ( See Top 100 in Kitchen ) #468 in Tumblers & Water Glasses |
| Brand Name | Blue Marble |
| Color | Black |
| Customer Reviews | 4.7 out of 5 stars 13,980 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 |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required | No |
| 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 |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 96.0 |
| Manufacturer Part Number | NGBULKGRIT |
| Material Type | Carbide of Silicon |
| Model Number | NGBULKGRIT |
| Number of Packs | 1 |
| Number of Players | 1 |
| Operation Mode | Manual |
| Power Source | battery_powered |
| Set Name | Bite Set with Stone |
| 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 |
S**Y
This works great
Works great.We took our granddaughter to a gem mine.She couldn't wait to get home and put in the tumbler.
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
J**M
Scheint gut zu funktionieren
Artikel wie beschrieben, gute Transportverpackung, gerne wieder
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.
K**M
Perfect size for the rock tumbler!
Exactly what I needed, more grit for my tumbler! I recently got some of my own beach rocks; quartz and serpentine, possibly some granite, and I needed these to tumble away! Good size, easy to use, functions as it should, measuring spoon and instructions made it easy to use. Think this is probably fun for kids, but definitely is for adults!
Trustpilot
1 month ago
3 weeks ago