---
product_id: 82423825
title: "National Geographic Rock Tumbler Refill Kit 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz Supplies Include Tumbler Grit and Jewelry Accessories"
brand: "blue marble"
price: "$108.01"
currency: USD
in_stock: true
category: "Blue Marble"
url: https://www.desertcart.us/products/82423825-national-geographic-rock-tumbler-refill-kit-3-lbs-of-rough
store_origin: US
region: United States of America
---

# 3 lbs of 9 gemstone varieties 4 jewelry accessories included 4-step grit system for flawless polish National Geographic Rock Tumbler Refill Kit 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz Supplies Include Tumbler Grit and Jewelry Accessories

**Brand:** blue marble
**Price:** $108.01
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, wear your story.

## Quick Answers

- **What is this?** National Geographic Rock Tumbler Refill Kit 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz Supplies Include Tumbler Grit and Jewelry Accessories by blue marble
- **How much does it cost?** $108.01 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/82423825-national-geographic-rock-tumbler-refill-kit-3-lbs-of-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

- • **Wear Your Art:** Craft custom necklaces, rings, earrings, and keychains with included jewelry fastenings.
- • **STEM Meets Style:** Engage in hands-on geology learning with an award-winning kit that blends education and elegance.
- • **Effortless Creativity:** No assembly or batteries needed—just pure, tactile fun for professionals and hobbyists alike.
- • **Transform Rough to Radiant:** Turn raw stones into museum-quality gems with a 4-stage tumbling grit system.
- • **Curated Gemstone Collection:** Explore 9 unique gemstones including Amethyst, Tiger’s Eye, and Rose Quartz for endless creativity.

## Overview

The National Geographic Rock Tumbler Refill Kit offers 3 pounds of 9 diverse rough gemstones, including Amethyst and Quartz, paired with a comprehensive 4-stage grit system to transform stones into polished gems. Complete with jewelry accessories and an educational guide, this award-winning STEM kit empowers creative professionals and hobbyists to craft personalized jewelry while deepening their geological knowledge.

## Description

Buy National Geographic Rock Tumbler Refill Kit 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz Supplies Include Tumbler Grit and Jewelry Accessories: Rock Tumblers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## 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 | #44,507 in Toys & Games ( See Top 100 in Toys & Games ) #19 in Kids' Rock Tumblers |
| Brand Name | Blue Marble |
| Color | Multicolor |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,414) |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448025914 |
| Included Components | 3 Pounds of rough Gemstones |
| Is Assembly Required | No |
| 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 Kilograms |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188.0 |
| 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 | Geology |
| UPC | 816448025914 |
| Unit Count | 1.0 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 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz Supplies Include Tumbler Grit and Jewelry Accessories - 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.

## 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.us/products/82423825-national-geographic-rock-tumbler-refill-kit-3-lbs-of-rough](https://www.desertcart.us/products/82423825-national-geographic-rock-tumbler-refill-kit-3-lbs-of-rough)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-13*