---
product_id: 257605860
title: "NATIONAL GEOGRAPHIC (Complete Starter Kit) - Rock Tumbler Media - Rock Polisher Tumbler Kit, 4 Stage Rock Tumbler Grit and Polish, Ceramic Pellets, GemFoam Polishing Foam, 1.4kg Madagascar Rocks, G..."
brand: "blue marble"
price: "852 kr"
currency: DKK
in_stock: true
url: https://www.desertcart.dk/products/257605860-national-geographic-complete-starter-kit-rock-tumbler-media-rock-polisher
store_origin: DK
region: Denmark
---

# 1.5 lbs ceramic media for noise & breakage reduction 3 lbs authentic Madagascar rocks 4-stage silicon carbide grit system NATIONAL GEOGRAPHIC (Complete Starter Kit) - Rock Tumbler Media - Rock Polisher Tumbler Kit, 4 Stage Rock Tumbler Grit and Polish, Ceramic Pellets, GemFoam Polishing Foam, 1.4kg Madagascar Rocks, G...

**Brand:** blue marble
**Price:** 852 kr
**Availability:** ✅ In Stock

## Summary

> ✨ Turn rough stones into dazzling gems—because your desk deserves a conversation starter! 🪨

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC (Complete Starter Kit) - Rock Tumbler Media - Rock Polisher Tumbler Kit, 4 Stage Rock Tumbler Grit and Polish, Ceramic Pellets, GemFoam Polishing Foam, 1.4kg Madagascar Rocks, G... by blue marble
- **How much does it cost?** 852 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/257605860-national-geographic-complete-starter-kit-rock-tumbler-media-rock-polisher)

## 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 adds an unprecedented glossy finish to your stones.
- • **STEM Meets Style:** Create personalized jewelry with included fastenings—science you can wear.
- • **Polish Like a Pro:** 4-stage silicon carbide grit delivers museum-quality shine on every rock.
- • **Authentic Madagascar Mix:** 3 pounds of rare rose quartz, jasper & more for a unique collection.
- • **Silent & Smooth Tumbling:** Ceramic media reduces noise and rock breakage for a premium experience.

## Overview

The National Geographic Complete Starter Kit offers a professional-grade 4-stage silicon carbide grit system, 3 pounds of authentic Madagascar rocks, and 1.5 pounds of ceramic media to optimize tumbling efficiency and reduce noise. Featuring the innovative GemFoam polishing media for an unmatched shine, this kit is perfect for geology enthusiasts and creative professionals alike, complete with jewelry fastenings and a detailed learning guide.

## Description

NATIONAL GEOGRAPHIC (Complete Starter Kit) - Rock Tumbler Media - Rock Polisher Tumbler Kit, 4 Stage Rock Tumbler Grit and Polish, Ceramic Pellets, GemFoam Polishing Foam, 1.4kg Madagascar Rocks, G...

## Features

- Polish incredible rocks from Madagascar! You'll have plenty of tumbling to do with 3 pounds 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!
- 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!
- Satisfaction guaranteed! The National Geographic STEM series provides high-quality products that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you.

## 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) | Learn About Geology |
| Language: | English |
| Number of Game Players | 1 |
| Number of Puzzle Pieces | 1 |
| Assembly Required | No |
| Batteries Required? | No |
| Batteries Included? | No |
| tech_spec_battery_description_toys | No batteries required |
| Material Type(s) | Rocks, Silicon Carbide, Ceramic, GemFoam, Metal |
| Material Care Instructions | Hand Wash Only |
| Remote Control Included? | No |
| Radio Control Suitability | Rock Tumbling Media for Polishing Rough Gemstones and Rocks |
| Color | multicoloured |
| Language | English |
| ASIN | B08B7JBVG9 |

## Product Details

- **Brand:** Blue Marble
- **Material:** Rocks, Silicon Carbide, Ceramic, GemFoam, Metal
- **Colour:** Multicolor
- **Special features:** GemFoam
- **Style:** Complete Starter Kit

## Images

![NATIONAL GEOGRAPHIC (Complete Starter Kit) - Rock Tumbler Media - Rock Polisher Tumbler Kit, 4 Stage Rock Tumbler Grit and Polish, Ceramic Pellets, GemFoam Polishing Foam, 1.4kg Madagascar Rocks, G... - 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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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-24*