---
product_id: 222518474
title: "Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media"
brand: "blue marble"
price: "KSh21011"
currency: KES
in_stock: true
reviews_count: 13
category: "Blue Marble"
url: https://www.desertcart.co.ke/products/222518474-blue-marble-national-geographic-rock-tumbler-media-the-ultimate-rock
store_origin: KE
region: Kenya
---

# Patented GemFoam media for unmatched shine 1.5 lbs ceramic pellets reduce noise & breakage 4-stage silicon carbide grit for precision polish Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media

**Brand:** blue marble
**Price:** KSh21011
**Availability:** ✅ In Stock

## Summary

> 💎 Polish Like a Pro, Shine Like a Star!

## Quick Answers

- **What is this?** Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media by blue marble
- **How much does it cost?** KSh21011 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/222518474-blue-marble-national-geographic-rock-tumbler-media-the-ultimate-rock)

## Best For

- blue marble enthusiasts

## Why This Product

- Trusted blue marble brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Compatibility:** Works seamlessly with any rock tumbler, making it the go-to kit for hobbyists and pros alike.
- • **Precision 4-Stage Grit System:** Achieve museum-quality polish with high-grade silicon carbide grit designed for 8-10 lbs of rocks.
- • **Award-Winning Quality & Support:** Backed by the Toy Association’s Toy of the Year and a dedicated U.S. support team for a flawless experience.
- • **GemFoam’s Patented Shine Boost:** Add GemFoam after final grit for a dazzling, showroom-worthy finish that sets your collection apart.
- • **Ceramic Pellets for Silent Efficiency:** Minimize tumbler noise and rock damage while optimizing grit distribution with 1.5 lbs of premium ceramic media.

## Overview

The Blue Marble National Geographic Rock Tumbler Media kit combines a 4-stage silicon carbide grit system, 1.5 pounds of noise-reducing ceramic pellets, and patented GemFoam polishing media to deliver superior rock tumbling results. Compatible with all tumblers and backed by award-winning quality, this kit transforms raw stones into brilliantly polished gems with ease.

## Description

desertcart.com: Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media : Industrial & Scientific

Review: Good quality. - My first experience with a rock tumbler and I love it. Works just as explained in the directions.
Review: My first run outcome - Im a kid again with this stuff! Easy to use, idiot proof instructions! Great outcomes.

## Features

- QUALITY RESULTS AND DAZZLING POLISH - The rock polishing grit in this pack is high-quality silicon carbide and will polish 8-10 lbs of rocks. Includes measuring scoop and storage containers with secure screw-top closures for easy storage.
- IMPROVE YOUR ROCK TUMBLING RESULTS – Ceramic tumbler media makes the entire rock tumbling process more effective, improving delivery of rock tumbling grit, quieting tumbler noise, reducing rock breakage, and acting as a filler for smaller batches.
- PATENTED WAY TO MAKE TUMBLED ROCKS SHINE – GemFoam is a unique, patented rock polisher media that gives unprecedented shine to tumbled rocks. Just add GemFoam to your tumbler after the final grit cycle for great results!
- WORKS WITH ANY ROCK TUMBLER – The tumbling supplies in this set are safe to use with any rock tumbler. The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results.
- AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08B7GRBK6 |
| Best Sellers Rank | #1,269 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Tumbling Media |
| Customer Reviews | 4.6 4.6 out of 5 stars (18,464) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.55 pounds |
| Item model number | NGFOMCERGRIT |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer recommended age | 8 years and up |
| Product Dimensions | 7.48 x 5.32 x 5.47 inches |
| Release date | September 17, 2021 |

## Images

![Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media - Image 1](https://m.media-amazon.com/images/I/816Sm4q3W2L.jpg)
![Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media - Image 2](https://m.media-amazon.com/images/I/81d0OZN7YCL.jpg)
![Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media - Image 3](https://m.media-amazon.com/images/I/81zuTQLidLL.jpg)
![Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media - Image 4](https://m.media-amazon.com/images/I/91H0Dew3jkL.jpg)
![Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media - Image 5](https://m.media-amazon.com/images/I/91eCeNB3WmL.jpg)

## Questions & Answers

**Q: Can Gemfoam be purchased separately?**
A: Yes, we do sell the Polishing Foam separately.

**Q: What is the difference between this and product # ngbulkgrit?**
A: Thank you so much for your inquiry. This item (the Complete Media Kit) contains the grit along with GemFoam to assist in the polishing stage and Ceramic Pellets to reduce rock breakage along with making the  tumbling process more quiet. The Bulk Grit does not contain the GemFoam or pellets, but does contain the grit.

**Q: How much of each medium is included in this accessories set?**
A: The jars shown hold approximately 2/3 of a cup, so plan on buying bulk bags in the near future.

**Q: My lid cracked and i need a new one. Are there replacement parts avaliable to buy?**
A: Not sure if you are referring to the tumbler canister lid but you will find replacement parts on Ebay under rock tumbler parts

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality.
*by J***E on December 19, 2025*

My first experience with a rock tumbler and I love it. Works just as explained in the directions.

### ⭐⭐⭐⭐⭐ My first run outcome
*by B***T on November 30, 2025*

Im a kid again with this stuff! Easy to use, idiot proof instructions! Great outcomes.

### ⭐⭐⭐⭐⭐ excelente
*by G***S on January 2, 2026*

excelente producto

## Frequently Bought Together

- Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media
- National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults
- NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1Lb. Gemstones and Rocks for Tumbling including Unpolished Amethyst and Quartz – Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-01-23*