---
product_id: 303579962
title: "National Geographic Rock Tumbler Mega Refill Kit - 3lbs"
brand: "blue marble"
price: "435.96 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Blue Marble"
url: https://www.desertcart.tn/products/303579962-national-geographic-rock-tumbler-mega-refill-kit-3lbs
store_origin: TN
region: Tunisia
---

# 3 lbs of 9 unique raw gemstones 6 jewelry fastenings for custom creations 4-step polishing grit for flawless shine National Geographic Rock Tumbler Mega Refill Kit - 3lbs

**Brand:** blue marble
**Price:** 435.96 DT
**Availability:** ✅ In Stock

## Summary

> 💎 Polish Your Passion, Wear Your Story!

## Quick Answers

- **What is this?** National Geographic Rock Tumbler Mega Refill Kit - 3lbs by blue marble
- **How much does it cost?** 435.96 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/303579962-national-geographic-rock-tumbler-mega-refill-kit-3lbs)

## 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:** Includes necklace, earrings, keychain, and ring fastenings to turn your polished stones into stunning jewelry pieces.
- • **Diverse Gemstone Collection:** Explore 9 varieties including Tiger’s Eye, Amethyst, and Rose Quartz—perfect for collectors and creators alike.
- • **STEM Learning Meets Hands-On Fun:** Comes with an engaging full-color guide packed with fascinating gemstone facts to fuel curiosity and knowledge.
- • **Transform Rough Rocks into Dazzling Gems:** Master the art of gemstone tumbling with four precision grit grades for a professional polish every time.
- • **Trusted Quality & Satisfaction Guaranteed:** Backed by National Geographic’s 131-year legacy and a 100% satisfaction promise for confident gifting and learning.

## Overview

The National Geographic Rock Tumbler Mega Refill Kit offers 3 pounds of nine distinct raw gemstones paired with four grades of polishing grit and six jewelry fastenings. Designed for ages 8 and up, this STEM-focused kit transforms rough stones into dazzling gems while providing an educational guide to deepen your knowledge. Perfect for creative professionals and hobbyists eager to craft personalized jewelry with a trusted brand legacy.

## Description

Stock Up with National Geographic’s Mega Gemstone Refill KitThis Gemstone Refill Kit Includes:- 9 types of raw gemstones (3 lbs in total)- 4 courses of polishing grit- 6 jewelry fastenings- 1 full-color learning guideNational Geographic Toys is proud to provide a 100% satisfaction guarantee with all our products so that you can buy with confidence. About the National Geographic Society: With a mission to inspire people to care about the planet, the 131-year-old National Geographic Society is one of the world's largest nonprofit scientific and educational organizations. National Geographic's net proceeds support vital exploration, conservation, research, and education programs.

Review: Sten - Det var bra med sten
Review: The actual stones are not as impressive as the picture - I like rocks and crystals, so after contemplating awhile I decided to get into tumbling. This was my first online rock order in bulk to try out fancy stones in the tumbler. I found the cupful of chips (what takes weight too) too much compared to the rest of the amount of rocks on the first sight.

## Features

- GEMSTONES OF NINE VARIETIES: Tiger’s Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Hematite. (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
- SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys 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 |
|---------------|-------|
| ASIN | B07H7WFWYT |
| Age Range Description | 8 years and up |
| Best Sellers Rank | #78,094 in Toys ( See Top 100 in Toys ) #993 in Educational Science Kits |
| Brand Name | Blue Marble |
| Color | Multicolor |
| Country of Publication | China |
| Customer Reviews | 4.7 out of 5 stars 2,323 Reviews |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448025914 |
| Included Components | 3 Pounds of rough Gemstones |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required | No |
| Item Dimensions | 13.6 x 13.5 x 13.8 centimeters |
| Item Type Name | for Rock Tumblers |
| Item Weight | 1.36 Kilograms |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 96 |
| Manufacturer Minimum Age (MONTHS) | 96.0 |
| Manufacturer Part Number | NGGEMREFILLMEGA |
| Manufacturer Warranty Description | National Geographic Toys is proud to provide a 100% satisfaction with all our products so that you can buy with confidence. |
| Material Type | Stone |
| Model Number | NGGEMREFILLMEGA |
| Operation Mode | Manual |
| Power Source | Hand-Powered |
| Set Name | Mega Refill |
| Size | 3 Pounds |
| Sub Brand | National Geographic |
| Subject Character | Gemstones |
| Supported Battery Types | No batteries required |
| Theme | Nature |
| UPC | 816448025914 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Blue Marble
- **Age range (description):** Kid
- **Colour:** Multicolor
- **Theme:** Nature
- **Item dimensions L x W x H:** 13.6 x 13.5 x 13.8 centimeters

## Images

![National Geographic Rock Tumbler Mega Refill Kit - 3lbs - Image 1](https://m.media-amazon.com/images/I/A1+omj2TEGL.jpg)

## Questions & Answers

**Q: Hello. The machine that turns the tumbler has suddenly stopped working - this happened after one day putting the 3rd grit and setting the tumbler to**
A: Hello, I can't view your entire question. Could you please rewrite it?

**Q: Is it battery operated?**
A: No, it plugs into an electrical outlet.

**Q: What power and plug type is this? 240v? 50hz?**
A: Hello.
The product is American made.  The plug is a type of receipt used by the US state.  You can use the plug converter to use. Our customers who buy the product use it this way. Thank you

**Q: The machine has suddenly stopped turning after placing the tumbler with the 3rd grit. The numbers 1-7 on the machine just keep flashing. Why?**
A: hello sir,please contact the store where you received the product. I don't understand the problem

## Customer Reviews

### ⭐⭐⭐ Sten
*by Z***M on 9 October 2023*

Det var bra med sten

### ⭐⭐⭐⭐ The actual stones are not as impressive as the picture
*by M***A on 5 January 2022*

I like rocks and crystals, so after contemplating awhile I decided to get into tumbling. This was my first online rock order in bulk to try out fancy stones in the tumbler. I found the cupful of chips (what takes weight too) too much compared to the rest of the amount of rocks on the first sight.

### ⭐⭐⭐⭐⭐ Ensemble de départ pour polissage de pierre
*by L***N on 24 June 2026*

Ensemble complet pour débuter

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.tn/products/303579962-national-geographic-rock-tumbler-mega-refill-kit-3lbs](https://www.desertcart.tn/products/303579962-national-geographic-rock-tumbler-mega-refill-kit-3lbs)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-05*