---
product_id: 259110946
title: "NATIONAL GEOGRAPHIC Hobby Tumbler - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit"
brand: "blue marble"
price: "$311.44"
currency: USD
in_stock: true
reviews_count: 5
category: "Blue Marble"
url: https://www.desertcart.us/products/259110946-national-geographic-hobby-tumbler-rock-polisher-for-kids-and-adults
store_origin: US
region: United States of America
---

# 2.5 lbs raw gemstone & jasper mix included 75% quieter leakproof rubber barrel Durable motor built to last years NATIONAL GEOGRAPHIC Hobby Tumbler - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit

**Brand:** blue marble
**Price:** $311.44
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, rock your STEM game!

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC Hobby Tumbler - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit by blue marble
- **How much does it cost?** $311.44 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/259110946-national-geographic-hobby-tumbler-rock-polisher-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:** Automatic shutoff and customizable tumbling cycles make it easy to fit into any busy schedule.
- • **Whisper-Quiet Operation:** Enjoy a 75% noise reduction thanks to the leakproof rubber barrel—perfect for home or classroom.
- • **Complete STEM Experience:** Includes tumbler, four polishing grits, sifter, learning guide, and bonus gemstone refill packs.
- • **Effortless Gemstone Creation:** Transform rough rocks into dazzling gems with simple one-touch controls.
- • **Award-Winning Educational Fun:** From the Toy Association’s Toy of the Year winner, inspiring creativity and scientific curiosity.

## Overview

The Blue Marble National Geographic Hobby Tumbler is a durable, noise-reduced rock polisher kit designed for kids and adults aged 8+. Featuring a powerful motor, leakproof rubber barrel that cuts noise by 75%, and 2.5 pounds of raw gemstones including jasper, this all-in-one STEM kit offers a hands-on educational experience. With easy one-touch controls, automatic shutoff, and comprehensive accessories, it’s an award-winning tool to spark creativity and build a stunning gemstone collection.

## Description

Great way to start a rock collection!learn about the exciting hobby of rock tumbling with National Geographic. This set includes everything you need including two bonus rough gemstone refill packs (jasper mix and variety). rock tumbling is tons of fun and a great way to start an extraordinary rock collection. Kids can use the included jewelry fastenings to create beautiful homemade jewelry!contents and features:national 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 126-year-old National Geographic society is one of the world's largest nonprofit scientific and educational organizations. National Geographic NET proceeds support vital exploration, conservation, research, and education programs.

Review: Poor Quality - The rock Tumbler worked for seven days. Unfortunately the item was a gift for our daughter and had been put away for a month or so resulting in the sellers inability to provide replacement or warranty. I do not recommend this product
Review: Love it - Thanks so much

## 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. Makes an excellent STEM gift or activity for girls and boys!
- Everything is included in the kit: Tumbler, Four Polishing Grits, Sifter, Learning Guide, Rough Gemstones PLUS Two Refill Packs of Rough and Jasper Gemstones
- 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, so you can 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 | B07G9MWHGJ |
| Age Range Description | 8 years and up |
| Age range (description) | 8 years and up |
| Battery Description | Alkaline |
| Brand | Blue Marble |
| Brand Name | Blue Marble |
| Customer Reviews | 4.5 out of 5 stars 2,182 Reviews |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448025891 |
| Included Components | Rock Tumbler, 2 Packs Gemstones |
| Is Assembly Required | No |
| Item Dimensions | 44.5 x 16.5 x 22 centimeters |
| Item Type Name | Hobby Rock Tumbling Kit - Rock Polisher for Kids & Adults, |
| Item Weight | 3.62 kg |
| Item dimensions L x W x H | 44.5 x 16.5 x 22 centimeters |
| Item weight | 3.62 kg |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 96.0 |
| Manufacturer Part Number | NGHOBBYBUN |
| Material Type | Plastic, Rubber |
| Model Number | NGHOBBYBUN |
| Set Name | Hobby Rock Tumbler Kit |
| Size | M |
| Sub Brand | National Geographic |
| Theme | Rock Tumbling |
| UPC | 816448025891 |
| Unit Count | 1 Count |

## Product Details

- **Age range (description):** 8 years and up
- **Brand:** Blue Marble
- **Item dimensions L x W x H:** 44.5 x 16.5 x 22 centimeters
- **Size:** M
- **Theme:** Rock Tumbling

## Images

![NATIONAL GEOGRAPHIC Hobby Tumbler - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit - Image 1](https://m.media-amazon.com/images/I/81eRSHVQ+aL.jpg)

## Customer Reviews

### ⭐ Poor Quality
*by S***A on 12 November 2021*

The rock Tumbler worked for seven days. Unfortunately the item was a gift for our daughter and had been put away for a month or so resulting in the sellers inability to provide replacement or warranty. I do not recommend this product

### ⭐⭐⭐⭐⭐ Love it
*by D***E on 8 February 2024*

Thanks so much

### ⭐⭐⭐⭐ Buen producto
*by J***A on 10 January 2026*

Muy bien producto hasta ahora me a encantado

## Frequently Bought Together

- National Geographic Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit
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- My Book of Rocks and Minerals: Things to Find, Collect, and Treasure

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-23*