---
product_id: 34238823
title: "National Geographic Hobby Rock Tumbler Kit for Kids and Adults Ages 8+ | Rough Gemstones, 4 Polishing Grits, Rock Polisher, Geology Science Kit, Rock Tumbling for Kids and Adults, Birthday Gift"
brand: "blue marble"
price: "$211.69"
currency: USD
in_stock: true
category: "Blue Marble"
url: https://www.desertcart.us/products/34238823-national-geographic-hobby-rock-tumbler-kit-for-kids-and-adults
store_origin: US
region: United States of America
---

# 75% quieter leakproof barrel STEM-focused educational kit Durable motor, built to last National Geographic Hobby Rock Tumbler Kit for Kids and Adults Ages 8+ | Rough Gemstones, 4 Polishing Grits, Rock Polisher, Geology Science Kit, Rock Tumbling for Kids and Adults, Birthday Gift

**Brand:** blue marble
**Price:** $211.69
**Availability:** ✅ In Stock

## Summary

> 💎 Turn your curiosity into sparkling reality!

## Quick Answers

- **What is this?** National Geographic Hobby Rock Tumbler Kit for Kids and Adults Ages 8+ | Rough Gemstones, 4 Polishing Grits, Rock Polisher, Geology Science Kit, Rock Tumbling for Kids and Adults, Birthday Gift by blue marble
- **How much does it cost?** $211.69 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/34238823-national-geographic-hobby-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

- • **Set & Forget Timer:** One-touch timer with automatic shutoff for hassle-free tumbling cycles
- • **Award-Winning STEM Fun:** From the Toy of the Year winner, inspiring creativity for ages 8+
- • **Complete All-in-One Kit:** Includes tumbler, 9 rough gemstones, sifter, and full-color STEM guide
- • **Whisper-Quiet Operation:** Enjoy focused creativity with a motor 75% quieter than competitors
- • **Transform Rough Rocks into Dazzling Gems:** Effortlessly polish stones with 4-step grit system for professional shine

## Overview

The National Geographic Hobby Rock Tumbler Kit is a durable, quiet, and easy-to-use STEM activity designed for kids and adults 8+. It includes a high-quality motorized tumbler, four polishing grits, nine types of rough gemstones, and a detailed educational guide, making it the perfect all-in-one kit to transform ordinary rocks into polished gems while fostering creativity and scientific learning.

## Description

Buy National Geographic Hobby Rock Tumbler Kit for Kids and Adults Ages 8+ | Rough Gemstones, 4 Polishing Grits, Rock Polisher, Geology Science Kit, Rock Tumbling for Kids and Adults, Birthday Gift: Rock Tumblers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- CREATE YOUR OWN GEMSTONES - Make any stone sparkle and polish everyday rocks into dazzling gemstones! This rock tumbler kit 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 – Our high-quality tumblers are made with a durable motor that’s designed to last for years. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. An excellent STEM activity for kids.
- A COMPLETE HOBBY TUMBLING KIT - Everything you need to create polished gemstones: the tumbler, four polishing grits, sifter, nine types of real rough gemstones, plus a detailed full-color learning guide. Makes a great gift for girls and boys!
- EASY TO USE – Simple instructions and one-touch settings make rock tumbling fun and easy. Control the number of days for each tumbling cycle with the one-touch timer and automatic shutoff feature, set it and forget it! This is a great gift for kids.
- 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 | B01LQCIL88 |
| Age Range Description | 8 years and up |
| Best Sellers Rank | #1,155 in Toys & Games ( See Top 100 in Toys & Games ) #1 in Kids' Rock Tumblers |
| Brand Name | Blue Marble |
| Customer Reviews | 4.5 4.5 out of 5 stars (25,877) |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448020421 |
| Included Components | Complete Rock Tumbling Kit |
| Item Dimensions | 13.81 x 4.88 x 8.06 inches |
| Item Type Name | Rock Tumbler Kit – Hobby Edition |
| Item Weight | 2.3 kg |
| Manufacturer | JMW Sales, Inc |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 96 |
| Manufacturer Part Number | NGHOBBYTUMBLER |
| Manufacturer Warranty Description | No Warranty |
| Material Type | Plastic |
| Model Number | NGHOBBYTUMBLER |
| Set Name | Hobby |
| Size | One Size |
| Sub Brand | National Geographic |
| Theme | Rock Tumbling |
| UPC | 816448020421 |
| Unit Count | 1 Count |

## Images

![National Geographic Hobby Rock Tumbler Kit for Kids and Adults Ages 8+ | Rough Gemstones, 4 Polishing Grits, Rock Polisher, Geology Science Kit, Rock Tumbling for Kids and Adults, Birthday Gift - Image 1](https://m.media-amazon.com/images/I/91yg3JBdlgL.jpg)

## Available Options

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

## Questions & Answers

**Q: What is the power consumption of this unit over a week of continuous use? (in usa on 110v). thank you.**
A: This takes .3 Amps, so (watts = amps x volts) OR watts = .3 x 110 which equals33 watts.  Now for one week would equal 33 watts x 7 days x 24 hours =5544 watts or 5.54 kilowatts for one week.At $.16 per kilowatt it comes to $.89 per week.

**Q: What the difference between this and the starter kit?**
A: There are two main differences:The Hobby Rock Tumbler has a rubber tumbling barrel with a stainless steel cap, which reduces noise and is more durable. The Starter Kit Rock Tumbler has a plastic barrel. The Hobby Rock Tumbler also has a keypad for setting the number of days you would like it to tumble, where as the Starter Kit Rock Tumbler's setting options are on/off. Thank you for your inquiry.

**Q: What pound tumbler is this product?**
A: Dearest National Geographic.... why would you only send 1# of rocks with a two pound tumbler?

**Q: Can i buy extra grit without the rocks. we have many rocks from "mining" gemstones that i would love to polish. what do you recommend?**
A: I recommend you follow the rock tumbler hobbiest MIchigan Rocks on Youtube. He's a good wealth of information for anyone getting into rock tumblers. He and other's mention that the polish from National Geographic is not good. I would go with rock tumbler polish offered by Polly Plastics.

## Frequently Bought Together

- 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
- 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

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-01*