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🪨 Transform ordinary stones into dazzling gems—polish like a pro!
The NATIONAL GEOGRAPHIC Rock Tumbler Grit is a high-quality 4-stage silicon carbide grit kit designed to polish up to 9 kg of rocks, gems, and glass. Compatible with all rock tumblers, it features easy-to-use, securely packaged grit stages that deliver professional-grade results while promoting geological learning for ages 8 and up.
| ASIN | B01MRKI4W0 |
| Age Range Description | 8 years and up |
| Best Sellers Rank | 51,008 in Toys & Games ( See Top 100 in Toys & Games ) 571 in Educational Science Kits |
| Brand Name | Blue Marble |
| Colour | Black |
| Customer Reviews | 4.6 out of 5 stars 14,782 Reviews |
| Educational Objective | Promote geological knowledge and provide practical learning experiences related to rocks and minerals |
| 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 centimetres |
| Item Type Name | Rock Tumbler Grit - Rock Polishing Grit Media |
| Item Weight | 1.78 Kilograms |
| Manufacturer | National Geographic |
| Manufacturer Part Number | NGBULKGRIT |
| Manufacturer Warranty Description | We're proud to make the highest quality products which are backed by exceptional service. |
| Material Type | Carbide of Silicon |
| Maximum Age Recommendation | 1188.00 |
| Minimum Age Recommendation | 96.00 |
| Model Number | NGBULKGRIT |
| Number of Players | 1 |
| Operation Mode | Manual |
| Set Name | Stone Bite Set |
| Size | M |
| Sub Brand | National Geographic |
| Supported Battery Types | No batteries required |
| Theme | Science |
| UPC | 816448020636 |
| Unit Count | 1.0 count |
A**R
Rock tumbler
Ideal hobby rock tumbler
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!
S**E
Perfect Refill Set
Perfect refill pack. More than enough quality materials to keep us tumbling rocks for many, many months. Great value and includes instructions, which was very handy as we misplaced the ones that came with the tumbler itself.
D**E
Rock polishing supplies
Bought for my son to replenish his rock polishing supplies. Has everything you need at a good quality. You will likely get some of this cheaper elsewhere, but stuck to the branded stuff. Good size of kit that should last a while.
L**S
Works
Handy tubs & spoon Work well all labelled & numbered
R**T
Good product
Really satisfied with the product. I'm still learning but for now it's doing fine.
C**T
Perfect!
Perfect for a rock tumbler machine.
C**N
All's good, machine setup and working.
Very happy with the purchase, all setup and re polishing some old amber beads. Lots of info on YouTube and have ordered much finer polishing grit/powder.
Trustpilot
2 weeks ago
4 days ago