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✨ Turn rough stones into polished gems—because your shelf deserves the spotlight!
The National Geographic Rock Tumbler Media Kit is a comprehensive 4-stage polishing system featuring high-quality silicon carbide grit, 1.5 lbs of ceramic media to reduce noise and breakage, and a patented GemFoam additive for superior shine. Compatible with all rock tumblers, this award-winning STEM kit delivers professional-grade results and inspires creativity for ages 8 and up.
| ASIN | B08B7GRBK6 |
| Age Range Description | 8 years and up |
| Brand Name | Blue Marble |
| Color | Black |
| Customer Reviews | 4.7 out of 5 stars 2,021 Reviews |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448027512 |
| Included Components | 1.5 Pounds of Ceramic Media, 10 mL Scoop, 30 g GemFoam, 4 Stages of Silicon Carbide Polishing Grit Compound |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required | No |
| Item Dimensions | 19 x 13.5 x 13.9 centimeters |
| Item Type Name | Ultimate Rock Polishing Supplies Kit |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188.0 |
| Manufacturer Minimum Age (MONTHS) | 96.0 |
| Manufacturer Part Number | NGFOMCERGRIT |
| Material Type | Rock |
| Model Number | NGFOMCERGRIT |
| Number of Players | 1 |
| Operation Mode | Manual |
| Power Source | AC adapter |
| Set Name | Ultimate Rock Polishing Supplies Kit |
| Size | M |
| Sub Brand | National Geographic |
| Subject Character | Quarter |
| Supported Battery Types | No batteries required |
| Theme | Geology |
| UPC | 816448027512 |
| Unit Count | 1 Count |
S**E
good stuff
exactly as pictured
K**Y
Rock Tumbling kit
I am surprised at how well this kit works. Just follow the instructions and you’ll have wonderfully polished rocks. I bought this kit and a separate tumbler just out of curiosity. I have so many rocks on the shelf now I’m sure my wife is hiding them. Definitely worth the purchase.
R**T
Quality and functionally.
This kit contains all that is required to produce polished stones of a high standard. The gemfoam gives a quality polish to be proud of. Those who tumble more often may require a bulk buy but this kit would suit most hobbyist.
C**T
Very quiet
Original tumbler had a fault but it was replaced very quickly. Excellent customer service and excellent product. Verrry quiet.
L**U
Rock tumbler grit
Did the job. Rocks coming out smooth.
Trustpilot
4 days ago
2 weeks ago