---
product_id: 269264802
title: "Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Media - GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbler Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies"
brand: "blue marble"
price: "฿1935"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/269264802-blue-marble-national-geographic-rock-tumbler-media-gemfoam-reusable-rock
store_origin: TH
region: Thailand
---

# Unprecedented shine boost Reusable up to 6 cycles Compatible with any tumbler Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Media - GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbler Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies

**Brand:** blue marble
**Price:** ฿1935
**Availability:** ✅ In Stock

## Summary

> ✨ Elevate Your Rock Game – Shine That Commands Attention!

## Quick Answers

- **What is this?** Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Media - GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbler Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies by blue marble
- **How much does it cost?** ฿1935 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/269264802-blue-marble-national-geographic-rock-tumbler-media-gemfoam-reusable-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

- • **Shine Like Never Before:** Add GemFoam after final grit for a dazzling polish that turns ordinary rocks into eye-catching gems.
- • **Universal Compatibility:** Works seamlessly with any durable rock tumbler, especially optimized for National Geographic tumblers.
- • **Eco-Friendly & Economical:** Reusable foam media lasts through 6 polishing cycles, saving you money and reducing waste.
- • **Effortless Polishing Process:** Simply add GemFoam, water, and rocks post-grit cycle, tumble up to 3 days, and reveal a brilliant shine.
- • **Award-Winning Quality & Support:** From the Toy of the Year-winning Blue Marble team, backed by expert U.S.-based customer service.

## Overview

The NATIONAL GEOGRAPHIC GemFoam Rock Polisher is a reusable foam media designed to add exceptional shine to tumbled rocks after the final grit cycle. Compatible with all durable tumblers and reusable up to six times, it simplifies the polishing process while delivering professional-grade results. Developed by the award-winning Blue Marble team, this product combines STEM education with creative craftsmanship for hobbyists aged 8 and up.

## Description

NATIONAL GEOGRAPHIC Rock Tumbler Media - GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbler Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies

## Features

- A BRAND NEW WAY TO MAKE TUMBLED ROCKS SHINE – GemFoam is a unique new rock polishing 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!
- A LITTLE GOES A LONG WAY – Add a pack of GemFoam to your rock tumbling arsenal and use for multiple tumbling projects. GemFoam is reusable for up to 6 rock polishing cycles and comes with a convenient reusable bag made of mesh for easy storage.
- WORKS WITH ANY ROCK POLISHER - GemFoam is safe to use with any durable tumbler. For best results, use with our National Geographic line of tumblers and rock tumbling supplies, like our ceramic media, tumbling grit, and rock refill packs.
- EASILY IMPROVE YOUR ROCK TUMBLING RESULTS - When your final rock tumbling grit cycle is complete, add GemFoam, water, and the rocks you'd like polished back to the tumbler and tumble up to 3 days. Rocks will will come out with polish and shine!
- 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 |
|---------------|-------|
| Product Dimensions | 11.99 x 3 x 18.49 cm; 35 g |
| Manufacturer recommended age | 8 years and up |
| Item model number | NGFOMBAG |
| Educational Objective(s) | STEM Skill |
| Number of Game Players | 1 |
| Assembly Required | No |
| Batteries Required? | No |
| Batteries Included? | No |
| tech_spec_battery_description_toys | No batteries required |
| Material Type(s) | Foam |
| Remote Control Included? | No |
| Color | Black |
| Release date | 15 July 2020 |
| ASIN | B08B7DJTCR |

## Images

![Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Media - GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbler Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies - Image 1](https://m.media-amazon.com/images/I/91Rp1wQXT4L.jpg)

## Available Options

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

## Frequently Bought Together

- Blue Marble National Geographic Rock Tumbling Media – GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbling Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies
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- 3LB Rock Tumbler Grit and Polish Refill Set, 4-Step Professional Polish Rock Tumbler Grit to Unlock Stunning Polished Stones. Ideal for National Geographic, KomeStone, and Other Polishers and Tumblers

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**Shop now:** [https://www.desertcart.co.th/products/269264802-blue-marble-national-geographic-rock-tumbler-media-gemfoam-reusable-rock](https://www.desertcart.co.th/products/269264802-blue-marble-national-geographic-rock-tumbler-media-gemfoam-reusable-rock)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-23*