---
product_id: 82423825
title: "National Geographic Rock Tumbler Refill Kit with 3 Lbs. Rough Gems | 3 Lbs. Rough Gemstones, Amethyst and Quartz, 4-Stage Grit, Jewelry Accessories, Rock Polishing Supplies"
brand: "blue marble"
price: "380.50 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Blue Marble"
url: https://www.desertcart.tn/products/82423825-national-geographic-rock-tumbler-refill-kit-with-3-lbs-rough
store_origin: TN
region: Tunisia
---

# 3 lbs. of 9 unique rough gemstones Includes jewelry fastenings for custom creations 4-stage grit system for flawless polish National Geographic Rock Tumbler Refill Kit with 3 Lbs. Rough Gems | 3 Lbs. Rough Gemstones, Amethyst and Quartz, 4-Stage Grit, Jewelry Accessories, Rock Polishing Supplies

**Brand:** blue marble
**Price:** 380.50 DT
**Availability:** ✅ In Stock

## Summary

> 💎 Turn your passion for gems into wearable brilliance!

## Quick Answers

- **What is this?** National Geographic Rock Tumbler Refill Kit with 3 Lbs. Rough Gems | 3 Lbs. Rough Gemstones, Amethyst and Quartz, 4-Stage Grit, Jewelry Accessories, Rock Polishing Supplies by blue marble
- **How much does it cost?** 380.50 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/82423825-national-geographic-rock-tumbler-refill-kit-with-3-lbs-rough)

## 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

- • **Create Wearable Art:** Craft personalized necklaces, earrings, rings, and keychains with included jewelry fastenings.
- • **Diverse Gemstone Collection:** Explore 9 stunning varieties including Amethyst, Tiger’s Eye, and Rose Quartz for endless creativity.
- • **Award-Winning Quality & Support:** From the Toy Association’s Toy of the Year winner, backed by U.S.-based customer care.
- • **STEM-Driven Learning Experience:** Engage with a detailed guide packed with fascinating gemstone facts to fuel curiosity and knowledge.
- • **Transform Rough Rocks into Dazzling Gems:** Master the art of gem polishing with 4 precision grit stages—coarse to polish.

## Overview

The National Geographic Rock Tumbler Refill Kit offers 3 pounds of 9 varieties of rough gemstones and a 4-stage grit polishing system, enabling users aged 8+ to transform raw stones into polished gems. Complete with jewelry fastenings and an educational guide, this award-winning kit combines STEM learning with creative craftsmanship, perfect for collectors and aspiring jewelers alike.

## Description

Buy National Geographic Rock Tumbler Refill Kit with 3 Lbs. Rough Gems | 3 Lbs. Rough Gemstones, Amethyst and Quartz, 4-Stage Grit, Jewelry Accessories, Rock Polishing Supplies: Rock Tumblers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great rocks to turn into gems - Perfect for rock collectors and gem Collectors alike you get a ton of rocks that you tumble into gems the quality is amazing easy to tumble
Review: Gift for great grandson’s birthday. - Bought this for great grandson’s birthday at his request. He was very pleased.

## Features

- Gemstones of nine varieties! Tiger’s Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Black Jasper. (3lb in total)
- Four grades of grit. Coarse, Medium, Fine, Polish. Transform your stones from rough rocks to dazzling gemstones!
- Jewelry fastenings. 1 Necklace, 1 set of Earrings, 1 Keychain, 1 Ring. Create custom jewelry from your newly polished gemstones!
- Learning guide. Our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts
- 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 | B07H7WFWYT |
| Age Range Description | 8 years and up |
| Best Sellers Rank | #50,726 in Toys & Games ( See Top 100 in Toys & Games ) #19 in Kids' Rock Tumblers |
| Brand Name | Blue Marble |
| Color | Multicolor |
| Customer Reviews | 4.7 out of 5 stars 2,411 Reviews |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448025914 |
| Included Components | 3 Pounds of rough Gemstones |
| Item Dimensions | 5.37 x 5.31 x 5.44 inches |
| Item Type Name | Rock Tumbler Mega Refill Kit - 3lbs Gemstones of 9 Varieties |
| Item Weight | 1.36 kg |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 96 |
| Manufacturer Part Number | NGGEMREFILLMEGA |
| Manufacturer Warranty Description | We're proud to make the highest quality products which are backed by exceptional service. |
| Material Type | Plastic |
| Model Number | NGGEMREFILLMEGA |
| Operation Mode | Manual |
| Set Name | National Geographic Rock Tumbler Refill Kit |
| Size | 3 Pounds |
| Sub Brand | National Geographic |
| Supported Battery Types | No batteries required |
| Theme | Gemstones |
| UPC | 816448025914 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Blue Marble
- **Age Range (Description):** Kid
- **Color:** Multicolor
- **Theme:** Geology
- **Item dimensions L x W x H:** 5.37 x 5.31 x 5.44 inches

## Images

![National Geographic Rock Tumbler Refill Kit with 3 Lbs. Rough Gems | 3 Lbs. Rough Gemstones, Amethyst and Quartz, 4-Stage Grit, Jewelry Accessories, Rock Polishing Supplies - Image 1](https://m.media-amazon.com/images/I/A1+omj2TEGL.jpg)

## Available Options

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

## Questions & Answers

**Q: how many pounds of rocks can the grit tumble**
A: The instructions for the Tumbler does not give a specific weight. It recommends not filling the Tumbler barrel more than 1/2 to 2/3 full. If you overfill the Tumbler, the built-in sensor will automatically protect the motor inside by turning the Tumbler off. It further recommends if this happens you should remove some of the rocks.The grit to be used in the Tumbler comes in premeasured packets for the Tumbler size itself.  I hope this helps.

**Q: Are these uncut gemstones sourced ethically? Can you provide evidence if so?**
A: I only buy from reliable dealers. I buy a lot from National Geographic through Amazon. I’m not sure where I can find proof. I’m sorry I couldn’t give you a better answer.

**Q: Where were the rock mined?**
A: I think they were mined in Madagascar.

**Q: Does this kit list the Mohs hardness of the different stones? I know you're not supposed to polish rocks with different hardness together**
A: No, there is not a Mohs hardness scale included in this kit, but you should be able to locate a copy online.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great rocks to turn into gems
*by K***P on January 12, 2026*

Perfect for rock collectors and gem Collectors alike you get a ton of rocks that you tumble into gems the quality is amazing easy to tumble

### ⭐⭐⭐⭐⭐ Gift for great grandson’s birthday.
*by A***R on March 11, 2026*

Bought this for great grandson’s birthday at his request. He was very pleased.

### ⭐⭐⭐⭐⭐ This Rocks
*by D***D on April 7, 2026*

Nice rocks that polish well.

## Frequently Bought Together

- 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
- 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
- Blue Marble National Geographic Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with Any Rock Polisher, Rock Tumbler Supplies

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-03*