---
product_id: 219416282
title: "National Geographic Rock Tumbler Grit and Rock Polishing Refill Kit | 3 Lbs. Madagascar Rocks, 4-Stage Grit and Polish, Ceramic Media, GemFoam Polish, Jewelry Accessories, Rock Polishing"
brand: "blue marble"
price: "89785CFA"
currency: XOF
in_stock: true
category: "Blue Marble"
url: https://www.desertcart.sn/products/219416282-national-geographic-rock-tumbler-grit-and-rock-polishing-refill-kit
store_origin: SN
region: Senegal
---

# 1.5 lbs ceramic media for smooth tumbling 3 lbs Madagascar rock mix 4-stage silicon carbide grit polish National Geographic Rock Tumbler Grit and Rock Polishing Refill Kit | 3 Lbs. Madagascar Rocks, 4-Stage Grit and Polish, Ceramic Media, GemFoam Polish, Jewelry Accessories, Rock Polishing

**Brand:** blue marble
**Price:** 89785CFA
**Availability:** ✅ In Stock

## Summary

> ✨ Transform Rough Rocks into Radiant Gems 🪨

## Quick Answers

- **What is this?** National Geographic Rock Tumbler Grit and Rock Polishing Refill Kit | 3 Lbs. Madagascar Rocks, 4-Stage Grit and Polish, Ceramic Media, GemFoam Polish, Jewelry Accessories, Rock Polishing by blue marble
- **How much does it cost?** 89785CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/219416282-national-geographic-rock-tumbler-grit-and-rock-polishing-refill-kit)

## 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

- • **Next-Level Shine:** GemFoam polish adds an unprecedented luster that will make your rocks the envy of every collector.
- • **Dazzle Like a Pro:** High-quality silicon carbide grit delivers a brilliant, museum-worthy polish every time.
- • **Exotic Madagascar Mix:** 3 pounds of authentic rose quartz, jasper, and gemstones to keep your collection fresh and unique.
- • **Award-Winning STEM Fun:** Backed by Toy of the Year winner Blue Marble, this kit inspires creativity and scientific curiosity for ages 8+.
- • **Whisper-Quiet Precision:** Ceramic media reduces noise and rock breakage, making your tumbling process smoother and more efficient.

## Overview

The National Geographic Rock Tumbler Refill Kit includes 3 lbs of authentic Madagascar rocks, a 4-stage silicon carbide grit polishing system, 1.5 lbs of ceramic media to enhance tumbling efficiency, and innovative GemFoam polish for superior shine. Designed for ages 8 and up, this award-winning STEM kit combines quality materials and expert design to deliver professional-grade rock polishing results with reduced noise and breakage.

## Description

desertcart.com: National Geographic Rock Tumbler Grit and Rock Polishing Refill Kit | 3 Lbs. Madagascar Rocks, 4-Stage Grit and Polish, Ceramic Media, GemFoam Polish, Jewelry Accessories, Rock Polishing : Industrial & Scientific

## 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.
- 3 POUNDS OF ROCKS FROM MADAGASCAR - Keep your rock tumbler going with 3 pounds of rocks from Madagascar. This rock refill pack can include rose quartz, jasper, and other rock and gemstone varieties.
- 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.
- AN INNOVATIVE 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!
- 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 | B08B7JBVG9 |
| Age Range Description | 8 years and up |
| Best Sellers Rank | #1,874 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Tumbling Media |
| Brand Name | Blue Marble |
| Color | Multicolor |
| Customer Reviews | 4.7 4.7 out of 5 stars (927) |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448027505 |
| Included Components | 1.5 pounds of Ceramic Media, 10 mL Grit Scoop, 3 Pound Madagascar Rock Refill Mix, 30 g GemFoam, 4 Stages of Silicon Carbide Polishing Grit Compound, Detailed Learning Guide with Instructions, Jewelry Fastenings |
| Indoor Outdoor Usage | Indoor |
| Item Dimensions | 9.84 x 7.09 x 5.51 inches |
| Item Highlight | 3 Lbs. Madagascar Rocks, 4-Stage Grit and Polish, Ceramic Media, GemFoam Polish, Jewelry Accessories, Rock Polishing |
| Item Type Name | Complete Rock Polisher Tumbler Media Kit |
| Item Weight | 3 pounds |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Part Number | NGFOMCERGRTMD |
| Manufacturer Warranty Description | We're proud to make the highest quality products which are backed by exceptional service. |
| Manufacturer recommended age | 8 years and up |
| Material Type | Rocks, Silicon Carbide, Ceramic, GemFoam, Metal |
| Model Number | NGFOMCERGRTMD |
| Operation Mode | Manual |
| Set Name | Complete Rock Polisher Tumbler Media Kit (7 Items) |
| Size | One Size |
| Sub Brand | National Geographic |
| Supported Battery Types | No batteries required |
| Theme | Rock Tumbling |
| UPC | 816448027505 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Blue Marble
- **Style:** Complete Starter Kit
- **Theme:** media
- **Recommended Uses For Product:** Travel, Home
- **Included Components:** (function(f) {var _np=(window.P._namespace("DetailPageProductOverviewTemplatesJava"));if(_np.guardFatal){_np.guardFatal(f)(_np);}else{f(_np);}}(function(P) {
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}));  Jewelry Fastenings, 10 mL Grit Scoop, 1.5 pounds of Ceramic Media, 4 Stages of Silicon Carbide Polishing Grit Compound, 3 Pound Madagascar Rock Refill Mix, 30 g GemFoam, Detailed Learning Guide with InstructionsJewelry Fastenings, 10 mL Grit Scoop,…    See more

## Images

![National Geographic Rock Tumbler Grit and Rock Polishing Refill Kit | 3 Lbs. Madagascar Rocks, 4-Stage Grit and Polish, Ceramic Media, GemFoam Polish, Jewelry Accessories, Rock Polishing - Image 1](https://m.media-amazon.com/images/I/91d7DbkcfYL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: How many oz is in each container?**
A: 1 Coarse-16oz.  2 Medium-13oz.  3 Pre-polish-12oz.  4 Polish-11.5 oz.

**Q: I just opened this and finished with grit one,  went to put grit 2 in and bottle open and 1/2 full. How do I contact seller?**
A: I would go through Amazon to get an answer for your problem.

**Q: Can it be used together ?**
A: Each grit is a different fineness intended for a specific purpose. We do not recommend using them at the same time.  We do recommend 1 TBS grit per per 1 LB rocks, at each cycle. For further information please contact us at help@natgeotoys.com.

**Q: After each step for the rocks in the kit, my rocks dry with a dull white finish.  It doesn't show when it is wet. Am I doing something wrong?**
A: No.  I find that after tumbling with the finest grit after the last step... and thoroughly allowing the rocks to dry, a nice coat of wax or oil brings out the color beautifully.

## Frequently Bought Together

- NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – Rock Tumbling Supplies including Rock Tumbler Grit and Polish Refill, Ceramic Media, GemFoam, 3 lbs Madagascar Rocks for Tumbling, Jewelry Accessories
- National Geographic Rock Tumbler Kit - 3 Lb. Extra Large Capacity Barrel with 3-Speed Motor & 9-Day Timer, Kit Includes Rocks for Tumbling and Rock Polisher Grit, Rock Tumbler for Adults and Kids
- National Geographic Rock Tumbler Refill Kit – 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit and Jewelry Accessories

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**Shop now:** [https://www.desertcart.sn/products/219416282-national-geographic-rock-tumbler-grit-and-rock-polishing-refill-kit](https://www.desertcart.sn/products/219416282-national-geographic-rock-tumbler-grit-and-rock-polishing-refill-kit)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-09-09*