---
product_id: 243528911
title: "NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Durable Noise-Reduced Barrel, Rocks, Grit & New GemFoam for a Shiny Finish, Cool Toys, Great STEM Hobby Kit"
brand: "blue marble"
price: "162420CFA"
currency: XOF
in_stock: true
category: "Blue Marble"
url: https://www.desertcart.sn/products/243528911-national-geographic-hobby-rock-tumbler-kit-rock-polisher-for-kids
store_origin: SN
region: Senegal
---

# Includes 9 gemstone types + GemFoam polisher 75% quieter leak-proof barrel Durable motor with timer control NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Durable Noise-Reduced Barrel, Rocks, Grit & New GemFoam for a Shiny Finish, Cool Toys, Great STEM Hobby Kit

**Brand:** blue marble
**Price:** 162420CFA
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, rock your world!

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Durable Noise-Reduced Barrel, Rocks, Grit & New GemFoam for a Shiny Finish, Cool Toys, Great STEM Hobby Kit by blue marble
- **How much does it cost?** 162420CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/243528911-national-geographic-hobby-rock-tumbler-kit-rock-polisher-for-kids)

## 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

- • **Complete All-in-One Kit:** Everything you need included—227g of rough stones, 4-stage grit, jewelry fastenings, strainer, and innovative GemFoam.
- • **Whisper-Quiet Operation:** Enjoy a noise-reduced barrel that’s 75% quieter than typical plastic models—perfect for home or office.
- • **Effortless Gemstone Creation:** Transform rough rocks into dazzling polished gems with simple, set-and-forget tumbling.
- • **Next-Level Shine with GemFoam:** Add the reusable GemFoam polisher for a brilliant, museum-quality finish that stands out.
- • **STEM-Approved Fun for All Ages:** Engage creativity and geology skills with a trusted National Geographic STEM kit designed for ages 8+.

## Overview

The National Geographic Hobby Rock Tumbler Kit is a durable, noise-reduced rock polisher designed for kids and adults. Featuring a robust motor with timer control, a leak-proof stainless steel lid barrel that operates 75% quieter than plastic alternatives, and an all-inclusive kit with 227 grams of rough rocks, 9 gemstone varieties, tumbler grit, jewelry fastenings, and the innovative reusable GemFoam polisher for a brilliant finish. Ideal for STEM learning and creative exploration, this kit makes gemstone crafting accessible and fun.

## Description

NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Durable Noise-Reduced Barrel, Rocks, Grit & New GemFoam for a Shiny Finish, Cool Toys, Great STEM Hobby Kit : desertcart.co.uk: Toys & Games

## Features

- CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This robust 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 has tumbling time control settings so you can set it and forget it. The leak-proof barrel features a stainless-steel lid and is 75% quieter overall than plastic tumbler barrels.
- ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get 227 grams of rough rocks with nine different types of gemstones inside, five jewelry fastenings, tumbler grit, a strainer, and our innovative new GemFoam rock polisher.
- USE GEMFOAM FOR DAZZLING RESULTS - This rock tumbler kit stands apart from others thanks to our new, reusable GemFoam rock polisher! Add GemFoam and water to the barrel after your final tumbling stage and your gems will have incredible shine!
- SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B086Z6ZB7R |
| Age Range Description | 8 years and up |
| Battery Description | Not required (mains powered) |
| Best Sellers Rank | 8,666 in Toys & Games ( See Top 100 in Toys & Games ) 119 in Educational Science Kits |
| Brand Name | Blue Marble |
| Country Of Origin | China |
| Customer Reviews | 4.2 4.2 out of 5 stars (3,675) |
| Educational Objective | Geology and Creative Thinking |
| Included Components | 1 Professional Rock Tumbler, 227 grams of rough rocks with nine different types of gemstones inside, 5 jewelry fastenings, 4-stage tumbler grit, Strainer, new GemFoam rock polisher |
| Is Assembly Required | No |
| Item Dimensions | 33.3 x 12.7 x 20.7 centimetres |
| Item Type Name | Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults |
| Item Weight | 1.9 Kilograms |
| Language | English |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Part Number | NGHOBBYTUMBLER2 |
| Manufacturer Warranty Description | No Warranty |
| Manufacturer recommended age | 8 - 10 years |
| Material Type | default_no_selection_value |
| Model Number | NGHOBBYTUMBLER2 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Set Name | Hobby Rock Tumbler Kit |
| Size | 13.86 x 5.04 x 8.15 inches |
| Sub Brand | National Geographic |
| Theme | Geology |
| UPC | 816448028830 |
| Unit Count | 1.0 count |

## Product Details

- **Age range (description):** 8 years and up
- **Brand:** Blue Marble
- **Item dimensions L x W x H:** 33.3 x 12.7 x 20.7 centimetres
- **Size:** 13.86 x 5.04 x 8.15 inches
- **Theme:** Geology

## Images

![NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Durable Noise-Reduced Barrel, Rocks, Grit & New GemFoam for a Shiny Finish, Cool Toys, Great STEM Hobby Kit - Image 1](https://m.media-amazon.com/images/I/81540OkRB7L.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 Hobby Rock Tumbler Kit – Durable Leak-Proof Rock Polisher with 7-Day Timer – Complete Rock Tumbling Kit – Geology Hobby for Kids, Educational STEM Science Kit, Rock Collection
- 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 Senegal*
*Store origin: SN*
*Last updated: 2026-09-14*