---
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: "1316 Lei"
currency: RON
in_stock: true
url: https://www.desertcart.ro/products/259110946-national-geographic-hobby-tumbler-rock-polisher-for-kids-and-adults
store_origin: RO
region: Romania
---

# 2.5 lbs raw gemstone & jasper mix 75% quieter leakproof barrel Durable motor built to last 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:** 1316 Lei
**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?** 1316 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/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:** One-touch timer with automatic shutoff lets you focus on life while your gems get polished.
- • **Whisper-Quiet Tumbling:** 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 2 gemstone refill packs.
- • **Effortless Gemstone Creation:** Transform rough rocks into dazzling gems with simple one-touch operation.
- • **Award-Winning Educational Fun:** From the Toy Association’s Toy of the Year winner, inspiring creativity and STEM skills.

## Overview

The Blue Marble NATIONAL GEOGRAPHIC Hobby Tumbler is a durable, noise-reduced rock polisher kit designed for kids and adults. Featuring a powerful motor, leakproof barrel that cuts noise by 75%, and 2.5 pounds of raw gemstones and jasper, it offers a complete STEM learning experience with easy one-touch controls and award-winning educational value.

## Description

NATIONAL GEOGRAPHIC Hobby Tumbler - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit

## 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 |
|---------------|-------|
| Product Dimensions | 44.5 x 16.51 x 22 cm; 3.62 kg |
| Manufacturer recommended age | 8 years and up |
| Item model number | NGHOBBYBUN |
| Educational Objective(s) | STEM |
| Number of Game Players | 1 |
| Assembly Required | No |
| Batteries Required? | No |
| Batteries Included? | No |
| tech_spec_battery_description_toys | Alkaline |
| Material Type(s) | Plastic, Rubber |
| Remote Control Type | None - Not Applicable |
| Color | Multicolor |
| ASIN | B07G9MWHGJ |

## Product Details

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

## 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)

## 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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**Shop now:** [https://www.desertcart.ro/products/259110946-national-geographic-hobby-tumbler-rock-polisher-for-kids-and-adults](https://www.desertcart.ro/products/259110946-national-geographic-hobby-tumbler-rock-polisher-for-kids-and-adults)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-06*