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💎 Turn rough stones into dazzling gems—because your collection deserves to shine!
The NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit features a high-quality, four-stage silicon carbide grit system designed to polish up to 20 lbs. of rocks, gems, and glass. Compatible with all tumblers, it includes easy-to-use, securely packaged grit stages and a precision 10 mL scoop for accurate measurement. Developed by award-winning Blue Marble, this kit supports STEM learning and creative exploration with exceptional polish results and reliable customer support.
| ASIN | B01MRKI4W0 |
| Age Range Description | 14 years and up |
| Best Sellers Rank | #1,415 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Tumbling Media |
| Brand Name | Blue Marble |
| Color | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (18,669) |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448020636 |
| Included Components | 4 Stages of Rock Polishing Grit, 10 mL Grit Scoop, Rock Tumbling Instructions |
| Is Assembly Required | No |
| Item Dimensions | 5.5 x 5.5 x 4.25 inches |
| Item Type Name | Rock Polishing Grit Media |
| Item Weight | 1.78 Kilograms |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 168 |
| Manufacturer Part Number | NGBULKGRIT |
| Manufacturer Warranty Description | We're proud to make the highest quality products which are backed by exceptional service. |
| Material Type | Silicone |
| Model Number | NGBULKGRIT |
| Number of Players | 1 |
| Operation Mode | Manual |
| Set Name | Rock Tumbler Grit Refill Kit |
| Size | One Size |
| Sub Brand | NATIONAL GEOGRAPHIC |
| Supported Battery Types | No batteries required |
| Theme | Rock Tumbling |
| UPC | 816448020636 |
| Unit Count | 1.0 Count |
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