---
product_id: 243434713
title: "National Geographic Professional Rock Tumbler Kit- Stone Polisher for Kids and Adults, Complete Kit with Durable Tumbler, Rocks, Grit, and GemFoam Polisher, A Great STEM Hobby"
brand: "blue marble"
price: "€ 313.60"
currency: EUR
in_stock: true
reviews_count: 13
category: "Blue Marble"
url: https://www.desertcart.com.cy/products/243434713-national-geographic-professional-rock-tumbler-kit-stone-polisher-for-kids
store_origin: CY
region: Cyprus
---

# Includes 9 gemstone types + GemFoam polisher 75% quieter stainless-steel barrel Durable motor with time & speed control National Geographic Professional Rock Tumbler Kit- Stone Polisher for Kids and Adults, Complete Kit with Durable Tumbler, Rocks, Grit, and GemFoam Polisher, A Great STEM Hobby

**Brand:** blue marble
**Price:** € 313.60
**Availability:** ✅ In Stock

## Summary

> 💎 Turn rough stones into polished gems—and your workspace into a creative sanctuary!

## Quick Answers

- **What is this?** National Geographic Professional Rock Tumbler Kit- Stone Polisher for Kids and Adults, Complete Kit with Durable Tumbler, Rocks, Grit, and GemFoam Polisher, A Great STEM Hobby by blue marble
- **How much does it cost?** € 313.60 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/243434713-national-geographic-professional-rock-tumbler-kit-stone-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

- • **STEM Meets Style:** A hands-on educational experience that transforms geology into wearable art—perfect for curious minds and creative pros.
- • **Set & Forget Precision:** Customizable time and speed controls let you perfect your polish without hovering.
- • **Whisper-Quiet Operation:** Engineered with a stainless-steel lid and leak-proof barrel for 75% less noise—ideal for home or office.
- • **All-Inclusive Gemstone Kit:** Comes with 453g of rough stones, tumbler grit, strainer, and reusable GemFoam for dazzling shine.
- • **Built to Last, Designed for Fun:** Robust construction ensures long-term use, making it the ultimate hobby upgrade for both kids and adults.

## Overview

The National Geographic Professional Rock Tumbler Kit is a durable, quiet, and easy-to-use STEM hobby tool that transforms rough rocks into polished gemstones. Featuring a powerful motor with adjustable time and speed, a leak-proof stainless-steel barrel that reduces noise by 75%, and a complete kit including 9 types of rough stones, tumbler grit, and the innovative reusable GemFoam polisher, it offers an all-in-one experience for both kids and adults eager to explore geology and create stunning jewelry-grade gems.

## Description

Turn rough rocks into polished gems with this durable, easy-to-use rock tumbler kit. Includes stones, grit, and GemFoam polisher for a fun STEM hobby.

Review: Quiet and easy to use - Bought a cheaper version of this, and it broke a drive belt almost daily. Sent it back for a refund and bought this one. This is much better, and has been running for a couple of weeks now with no issues. It is also considerably quieter than the other one (although I still wouldn't want it in a room I spend a lot of time in). Feels good quality, it's been running well and it is really simple and easy to use. Very impressed.
Review: Good Quality small machine and stones, ideal for a beginner. - Great for a beginner. Handy booklet to tell you about the stones. I got 2 large chunks of Adventurine which look nice but can't be made into earring or pendants. Plenty of Rose quarts some of which disappeared to small pieces, could be used in UV Resin jewellery. 1 exceptionally tiny amethyst , very little use except for small pendant. Plenty of Tigers Eye. One largest piece of Sodalite. Quite a bit of 'Dalmation stone? . Dont know if Hematite is in my lot, some Jasper and poss agate ... hard to tell. The machine itself is quiet enough in my conservatory and can't be heard through the house, easy to use . The booklet gives clear instructions too which is good. The grits are only enough for one tumble but the polishing gem foam can be used 6 times. The tumbler is sturdy and easy to use but mine has a tendency to bleed to the bottom edge of the tumbler onto the rollers and butt up against the rotating wheels so I turn the tumbler tub around . Not sure what lasting effect this will have on the tumbler rubber. All in all I would recommend this set , as ive bought more gem stones from NG to practice on. Its neat and compact and easy to use, but for children I would recommend adult supervision and it to be kept out the way of curious little fingers. You need a lot of patience as each procedure takes days.

## Features

- CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This professional 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 time and speed control settings so you can set it, and forget it. An improved, leak-proof barrel features a stainless-steel lid is 75% quieter overall than plastic tumbler barrels.
- ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get 453 grams of rough rocks with nine different types of gemstones inside, five jewellery 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 | B086Z83SV5 |
| Assembly Required | No |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 34,471 in Toys & Games ( See Top 100 in Toys & Games ) 427 in Educational Science Kits |
| Colour | Black |
| Customer Reviews | 4.3 4.3 out of 5 stars (4,160) |
| Date First Available | 10 April 2020 |
| Educational Objective(s) | Geological exploration, observation skills, logical thinking |
| Item model number | NGPROTUMBLER3 |
| Language | English |
| Manufacturer recommended age | 8 - 10 years |
| Material Type(s) | Multiple |
| Number of Game Players | 1 |
| Product Dimensions | 32 x 17 x 26 cm; 3.04 kg |
| Remote Control Included? | No |
| tech_spec_battery_description_toys | No battery required |

## Product Details

- **Age range (description):** Kid, Adult
- **Brand:** Blue Marble
- **Item dimensions L x W x H:** 32 x 17 x 26 centimetres
- **Size:** 12.6 x 6.7 x 10.25 inches
- **Theme:** Earth Science

## Images

![National Geographic Professional Rock Tumbler Kit- Stone Polisher for Kids and Adults, Complete Kit with Durable Tumbler, Rocks, Grit, and GemFoam Polisher, A Great STEM Hobby - Image 1](https://m.media-amazon.com/images/I/813f+VXqndL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quiet and easy to use
*by R***R on 6 June 2025*

Bought a cheaper version of this, and it broke a drive belt almost daily. Sent it back for a refund and bought this one. This is much better, and has been running for a couple of weeks now with no issues. It is also considerably quieter than the other one (although I still wouldn't want it in a room I spend a lot of time in). Feels good quality, it's been running well and it is really simple and easy to use. Very impressed.

### ⭐⭐⭐⭐⭐ Good Quality small machine and stones, ideal for a beginner.
*by W***T on 27 March 2021*

Great for a beginner. Handy booklet to tell you about the stones. I got 2 large chunks of Adventurine which look nice but can't be made into earring or pendants. Plenty of Rose quarts some of which disappeared to small pieces, could be used in UV Resin jewellery. 1 exceptionally tiny amethyst , very little use except for small pendant. Plenty of Tigers Eye. One largest piece of Sodalite. Quite a bit of 'Dalmation stone? . Dont know if Hematite is in my lot, some Jasper and poss agate ... hard to tell. The machine itself is quiet enough in my conservatory and can't be heard through the house, easy to use . The booklet gives clear instructions too which is good. The grits are only enough for one tumble but the polishing gem foam can be used 6 times. The tumbler is sturdy and easy to use but mine has a tendency to bleed to the bottom edge of the tumbler onto the rollers and butt up against the rotating wheels so I turn the tumbler tub around . Not sure what lasting effect this will have on the tumbler rubber. All in all I would recommend this set , as ive bought more gem stones from NG to practice on. Its neat and compact and easy to use, but for children I would recommend adult supervision and it to be kept out the way of curious little fingers. You need a lot of patience as each procedure takes days.

### ⭐⭐⭐⭐ Poor quality motor.
*by M***Y on 18 August 2025*

Worked well for 2 months and got good results on 2 sets of rocks but now it won't stay on and just cuts out all the time. Thanks to the product support for a replacement machine. Very good communications. Well done.

## Frequently Bought Together

- NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Rock Polisher
- 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 Cyprus*
*Store origin: CY*
*Last updated: 2026-01-28*