---
product_id: 34394992
title: "National Geographic Starter Rock Tumbler Kit for Kids and Adults | Leak-Proof Rubber Barrel, 1/2 Lb. Rough Gemstones, 4-Stage Polishing Grit, Jewelry Fastenings, Geology Hobby, Birthday Gift"
brand: "blue marble"
price: "$130.63"
currency: USD
in_stock: true
category: "Blue Marble"
url: https://www.desertcart.us/products/34394992-national-geographic-starter-rock-tumbler-kit-for-kids-and-adults
store_origin: US
region: United States of America
---

# Includes ½ lb of 9 gemstone types Leak-proof, rubber-lined barrel Durable motor for multiple batches National Geographic Starter Rock Tumbler Kit for Kids and Adults | Leak-Proof Rubber Barrel, 1/2 Lb. Rough Gemstones, 4-Stage Polishing Grit, Jewelry Fastenings, Geology Hobby, Birthday Gift

**Brand:** blue marble
**Price:** $130.63
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, rock your world!

## Quick Answers

- **What is this?** National Geographic Starter Rock Tumbler Kit for Kids and Adults | Leak-Proof Rubber Barrel, 1/2 Lb. Rough Gemstones, 4-Stage Polishing Grit, Jewelry Fastenings, Geology Hobby, Birthday Gift by blue marble
- **How much does it cost?** $130.63 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/34394992-national-geographic-starter-rock-tumbler-kit-for-kids-and-adults)

## 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

- • **STEM Meets Fun:** Step-by-step instructions and a colorful learning guide make geology engaging and educational.
- • **Built to Endure:** Robust motor and spill-proof design ensure long-lasting, quiet tumbling sessions.
- • **Award-Winning Quality:** From the Toy Association’s Toy of the Year winner, backed by U.S. support for a premium experience.
- • **Complete All-in-One Kit:** Includes rocks, crystals, jewelry fastenings, and four-stage polishing grit for instant creativity.
- • **Effortless Gemstone Creation:** Transform rough stones into polished gems with simple, kid-friendly operation.

## Overview

The National Geographic Starter Rock Tumbler Kit is a durable, leak-proof rock polisher designed for kids 8 and up. This all-inclusive kit features a powerful motor, rubber-lined barrel, ½ pound of diverse rough gemstones, jewelry fastenings, and a four-stage polishing grit system. It combines hands-on STEM learning with creative fun, supported by award-winning quality and detailed educational guides.

## Description

desertcart.com: National Geographic Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Tumbling Kit with Rocks & Crystals (desertcart Exclusive) : Toys & Games

## Features

- CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This starter rock tumbler makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.
- A TUMBLER THAT'S MADE TO LAST - The durable motor allows you to tumble multiple batches of rocks. An improved, leak-proof barrel is lined with rubber for quieter operation while tumbling on the sturdy tumbler base.
- ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get ½ a pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, and our four-stage rock polishing grit.
- EASY TO USE AND EDUCATIONAL - Detailed tumbler instructions lead you step-by-step through the rock tumbling process, A full-color learning guide details how rocks are naturally polished and has fascinating facts about the gemstones in the kit.
- 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 | B01I56RV0C |
| Additional Features | Spill-Proof |
| Age Range Description | 8 years and up |
| Art Craft Kit Type | Rock Polishing |
| Best Sellers Rank | #11,530 in Toys & Games ( See Top 100 in Toys & Games ) #4 in Kids' Rock Tumblers |
| Brand Name | Blue Marble |
| Color | Multicolor |
| Customer Reviews | 4.3 4.3 out of 5 stars (11,110) |
| Global Trade Identification Number | 00816448020391 |
| Included Components | 5 Jewelry Fastenings, Four Levels of Grit, Leak-proof, Rubber-lined Tumbler Barrel, Rock Tumbler, ½ Pound of Stones |
| Item Dimensions | 10.98 x 5.2 x 12 inches |
| Item Type Name | Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks and Crystals for Kids, A Great STEM Activity |
| Item Weight | 1.9 Kilograms |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Part Number | NGTUMBLER2 |
| Material Type | Rubber |
| Model Name | Complete Rock Tumbling Hobby Kit |
| Model Number | NGTUMBLER2 |
| Number of Pieces | 30 |
| Product Style | Modern |
| Set Name | Necklace, Key chain, Ring, Two clip-on earring fastenings |
| Size | 1 Count (Pack of 1) |
| Subject Character | Rock Tumbling, Gemstones |
| Theme | Geology |
| UPC | 816448020391 |
| Unit Count | 1.0 Count |
| Warranty Description | We're proud to make the highest quality products which are backed by exceptional service. |

## Product Details

- **Age Range (Description):** 8 years and up
- **Brand:** Blue Marble
- **Color:** Multicolor
- **Item dimensions L x W x H:** 10.98 x 5.2 x 12 inches
- **Theme:** Geology

## Images

![National Geographic Starter Rock Tumbler Kit for Kids and Adults | Leak-Proof Rubber Barrel, 1/2 Lb. Rough Gemstones, 4-Stage Polishing Grit, Jewelry Fastenings, Geology Hobby, Birthday Gift - Image 1](https://m.media-amazon.com/images/I/91kh7806KEL.jpg)

## Questions & Answers

**Q: Can this be used to tumble glass to make sea glass?**
A: Yes! I have a spot where I find lots of shards of glass and rare colors but they just aren’t “cooked” enough. I got the tumbler to finish them. The glass I have is real sea glass not fake nor bottles I break (which I have never done and won’t because I like that I find my glass and know it has a story from whence it came!) I have found it along beaches and rivers but it just needed some extra time to be perfect but because of the color rarity I wasn’t going to toss it back!

**Q: Where can I buy more grit?**
A: Amazon (there are alternatives if you want to search for a specific one you need: coarse (60/90 grit), medium (150/220 grit), fine (500 grit), rock polish (TXP aluminum oxide) but below are two choices that will contain all you’d need, are approx the same lbs of material, and will work equally well):

https://www.amazon.com/dp/B01MRKI4W0/ref=cm_sw_r_cp_api_i_8luBDbAX0440H

https://www.amazon.com/dp/B07PYFGT44/ref=cm_sw_r_cp_api_i_SkuBDbZFZBTVW

**Q: How many pounds/ounces of rocks can you put into the barrel with grit for tumbling?**
A: The Rock Tumbler can hold 1lb (16oz) of rocks in the barrel with the grit for tumbling.Thank you for your inquiry!

**Q: How long does it take from start to finish? And can you use any rocks or only the ones that come with it**
A: Each grade of sand is a different grit. About 3 weeks and one extra week to polish. You can run any rocks even ones that you find.

## Frequently Bought Together

- NATIONAL GEOGRAPHIC Starter Rock Tumbling Kit - Durable Leak-Proof Polisher for Kids Complete Geology Hobby Science Kit, Rocks and Crystals Kids, A Great STEM Activity
- NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1Lb. Gemstones and Rocks for Tumbling including Unpolished Amethyst and Quartz – Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories
- 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 United States of America*
*Store origin: US*
*Last updated: 2026-07-29*