---
product_id: 394896877
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: "A$273"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/394896877-blue-marble-national-geographic-rock-tumbler-media-the-ultimate-rock
store_origin: AU
region: Australia
---

# GemFoam media delivers unmatched gemstone shine 1.5 lbs ceramic pellets reduce noise & breakage 4-stage silicon carbide grit for precision polishing 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:** A$273
**Availability:** ✅ In Stock

## Summary

> 💎 Turn ordinary stones into extraordinary gems—shine like never before!

## 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?** A$273 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/394896877-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

- • **Ceramic Media Magic:** Quiet your tumbler and protect your stones with 1.5 lbs of noise-dampening, breakage-reducing ceramic pellets.
- • **GemFoam Shine Booster:** Add the patent-pending GemFoam for a dazzling, museum-quality polish that turns rocks into conversation starters.
- • **Universal Compatibility:** Designed to elevate any rock tumbler’s performance—perfect for pros and hobbyists alike.
- • **Precision 4-Stage Grit System:** From rough to radiant—engineered silicon carbide grit sculpts and polishes with expert finesse.
- • **STEM-Approved Educational Kit:** Hands-on science meets stunning results—ideal for curious minds aged 8+ aiming to master geology and chemistry.

## Overview

The Blue Marble National Geographic Rock Tumbler Media kit includes a complete 4-stage silicon carbide grit system, 1.5 pounds of ceramic pellets to reduce noise and rock breakage, and the innovative GemFoam polishing media for superior shine. Compatible with all rock tumblers, this STEM-focused kit offers precise measuring tools and secure storage, delivering professional-grade polishing results for hobbyists and educators alike.

## Description

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

## Features

- QUALITY GRIT RESULTS IN A 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
- BRAND NEW WAY TO MAKE TUMBLED ROCKS SHINE – GemFoam is a unique new rock polisher media that gives unprecedented shine to tumbled rocks. Just add the patent-pending rock polishing media 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
- HIGH-QUALITY EDUCATIONAL PRODUCTS - We're proud to make the highest quality hands-on science products, and all are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Educational Objective(s) | STEM |
| Model Number | NGFOMCERGRIT |
| Number of Game Players | 1 |
| Assembly Required | No |
| Batteries Required | No |
| tech_spec_battery_description_toys | No batteries required |
| Material Type(s) | Glass,Gems |
| Remote Control Included? | No |
| Colour | Black |
| Product Dimensions | 19 x 13.49 x 14 cm; 2.52 kg |
| Item model number | NGFOMCERGRIT |
| Manufacturer recommended age | 8 years and up |
| Manufacturer | JMW Sales, Inc. |
| Item Weight | 2 kg 520 g |

## 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/91oyBF1mZaL.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

## 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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**Shop now:** [https://www.desertcart.com.au/products/394896877-blue-marble-national-geographic-rock-tumbler-media-the-ultimate-rock](https://www.desertcart.com.au/products/394896877-blue-marble-national-geographic-rock-tumbler-media-the-ultimate-rock)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-25*