---
product_id: 319966455
title: "NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Rock Tumbling Supplies including Grit and Polish Refills, Ceramic Media, GemFoam, 1.36 kg Madagascar Rocks for Tumbling, Jewellery Accessories"
brand: "blue marble"
price: "795 Lei"
currency: RON
in_stock: true
url: https://www.desertcart.ro/products/319966455-national-geographic-rock-tumbler-refill-kit-rock-tumbling-supplies-including
store_origin: RO
region: Romania
---

# GemFoam for unmatched rock shine 1.36 kg authentic Madagascar rocks Silicon carbide grit for 4 kg polishing NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Rock Tumbling Supplies including Grit and Polish Refills, Ceramic Media, GemFoam, 1.36 kg Madagascar Rocks for Tumbling, Jewellery Accessories

**Brand:** blue marble
**Price:** 795 Lei
**Availability:** ✅ In Stock

## Summary

> ✨ Rock your world with brilliance and quiet power! 🪨

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Rock Tumbling Supplies including Grit and Polish Refills, Ceramic Media, GemFoam, 1.36 kg Madagascar Rocks for Tumbling, Jewellery Accessories by blue marble
- **How much does it cost?** 795 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/319966455-national-geographic-rock-tumbler-refill-kit-rock-tumbling-supplies-including)

## 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:** Patent-pending GemFoam media adds an unprecedented glossy finish after the final polish cycle.
- • **Polish Like a Pro:** High-quality silicon carbide grit refines up to 4 kg of rocks, gems, and glass to a dazzling finish.
- • **STEM-Approved Fun:** Educational and hands-on, this kit sharpens fine motor skills and patience—perfect for curious minds aged 8+.
- • **Treasure Your Tumbling:** Includes 1.36 kg of rare Madagascar stones like rose quartz and jasper for a truly unique collection.
- • **Silent & Smooth Operation:** Ceramic media reduces noise, prevents breakage, and optimizes grit delivery for flawless tumbling.

## Overview

The NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit offers 1.36 kg of authentic Madagascar rocks, premium silicon carbide grit for polishing up to 4 kg of stones, and innovative ceramic and GemFoam media to enhance tumbling efficiency, reduce noise, and deliver an exceptional shine. Designed for ages 8+, this kit combines educational value with professional-grade rock polishing supplies.

## Description

NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Rock Tumbling Supplies including Grit and Polish Refills, Ceramic Media, GemFoam, 1.36 kg Madagascar Rocks for Tumbling, Jewellery Accessories

## Features

- POLISH INCREDIBLE ROCKS FROM MADAGASCAR - You'll have plenty of tumbling to do with 1.36 kilograms of rocks from Madagascar. This rock refill pack can include rose quartz, jasper, and more. It's an awesome assortment of rocks you will treasure forever!
- HIGH QUALITY – This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on approximately 4 kilograms of rocks, gems, glass, and more
- 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!
- HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products 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 |
|---------------|-------|
| Product Dimensions | 25 x 18 x 14 cm; 1.36 kg |
| Manufacturer recommended age | 8 years and up |
| Item model number | NGFOMCERGRTMD |
| Educational Objective(s) | Develops fine motor skills, patience and following instructions |
| Language: | English |
| Number of Game Players | 1 |
| Number of pieces | 1 |
| Assembly Required | No |
| Batteries Required? | No |
| Batteries included? | No |
| tech_spec_battery_description_toys | No batteries required |
| Material Type(s) | Ceramic |
| Material Care Instructions | Hand Wash Only |
| Remote Control Included? | No |
| Radio Control Suitability | Rock Tumbling Media for Polishing Rough Gemstones and Rocks |
| Colour | Multicolor |
| Release date | 15 Jun. 2020 |
| ASIN | B08B7JBVG9 |

## Product Details

- **Brand:** Blue Marble
- **Colour:** Multicolor
- **Special feature:** GemFoam
- **Style:** Complete Starter Kit
- **Theme:** Gemstone Tumbling Media

## Images

![NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Rock Tumbling Supplies including Grit and Polish Refills, Ceramic Media, GemFoam, 1.36 kg Madagascar Rocks for Tumbling, Jewellery Accessories - Image 1](https://m.media-amazon.com/images/I/91d7DbkcfYL.jpg)

## Available Options

This product comes in different **Style Name** 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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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-12*