---
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: "VT63018"
currency: VUV
in_stock: true
reviews_count: 12
category: "Blue Marble"
url: https://www.desertcart.vu/products/243528911-national-geographic-hobby-rock-tumbler-kit-rock-polisher-for-kids
store_origin: VU
region: Vanuatu
---

# 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:** VT63018
**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?** VT63018 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/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—rocks, grit, strainer, jewelry fastenings, and innovative GemFoam included.
- • **Whisper-Quiet Operation:** Enjoy your hobby without the noise—75% quieter than typical plastic barrels.
- • **Effortless Gemstone Creation:** Transform rough stones into dazzling gems with simple, set-and-forget tumbling.
- • **Next-Level Shine with GemFoam:** Add GemFoam in the final stage for a professional, mirror-like polish that stands out.
- • **STEM-Approved & Multi-Generational:** Perfect for curious minds 8 and up, blending geology education with creative fun.

## Overview

The NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit is a durable, noise-reduced rock polisher designed for kids and adults aged 8+. Featuring a robust motor with tumbling time control and a leak-proof stainless steel lid barrel that’s 75% quieter than plastic alternatives, this all-in-one STEM kit includes 227g of rough rocks with nine gemstone varieties, tumbler grit, a strainer, jewelry fastenings, and the innovative reusable GemFoam polisher for a brilliant finish. Ideal for geology enthusiasts seeking a hands-on creative hobby that delivers professional-quality polished stones.

## 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

Review: Customer service is brilliant - To be honest it started flashing and being very temperamental after a month , then just wouldn't spin. I contacted customer service and they were absolutely brilliant and are sending me a new machine. I've had another one for years with no problems so they don't all go faulty and if they do rest assured the customer service is amazing.
Review: Perfect in Every Way but not a toy for a 5 year old. - I had one of these when I was 13, just 43 years ago then :) I can see it on the shelf in the garage so when my 23 year old expressed an interest I popped to the parents to retrieve it. Gone of course. So I've bought her this one for her birthday today. It does the job, polishes stones, beach stones look fab after treatment. I loved it, living at the seaside, you can equally tumble pathway stones or stones from the garden. And if you buy the correct medium (ball bearings) you can turn shiny glass beads into matt beads naturally instead of using etching fluid. Please though, this isn't a toy for a 5 year old, buy them something to push around the garden or a dolls house or a train set. No child of mine was ever going to find any sort of thrill in a stone tumbler that did nothing but turn around for 4-6 weeks and produce shiny stones until they were teenagers. Please be realistic. It doesn't mean it's not a good product. Yes of course it makes a noise, it has stones tumbling around inside it, what do you expect. Stick it in the garage or in a cupboard if it's a problem for you . A great little machine.

## 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 | 10,516 in Toys & Games ( See Top 100 in Toys & Games ) 125 in Educational Science Kits |
| Brand Name | Blue Marble |
| Country Of Origin | China |
| Customer Reviews | 4.2 4.2 out of 5 stars (3,625) |
| 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 |
| Material Type | default_no_selection_value |
| Maximum Age Recommendation | 120 |
| Minimum Age Recommendation | 96.00 |
| Model Number | NGHOBBYTUMBLER2 |
| Set Name | 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)

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Customer service is brilliant
*by V***. on 18 September 2023*

To be honest it started flashing and being very temperamental after a month , then just wouldn't spin. I contacted customer service and they were absolutely brilliant and are sending me a new machine. I've had another one for years with no problems so they don't all go faulty and if they do rest assured the customer service is amazing.

### ⭐⭐⭐⭐⭐ Perfect in Every Way but not a toy for a 5 year old.
*by A***R on 1 April 2022*

I had one of these when I was 13, just 43 years ago then :) I can see it on the shelf in the garage so when my 23 year old expressed an interest I popped to the parents to retrieve it. Gone of course. So I've bought her this one for her birthday today. It does the job, polishes stones, beach stones look fab after treatment. I loved it, living at the seaside, you can equally tumble pathway stones or stones from the garden. And if you buy the correct medium (ball bearings) you can turn shiny glass beads into matt beads naturally instead of using etching fluid. Please though, this isn't a toy for a 5 year old, buy them something to push around the garden or a dolls house or a train set. No child of mine was ever going to find any sort of thrill in a stone tumbler that did nothing but turn around for 4-6 weeks and produce shiny stones until they were teenagers. Please be realistic. It doesn't mean it's not a good product. Yes of course it makes a noise, it has stones tumbling around inside it, what do you expect. Stick it in the garage or in a cupboard if it's a problem for you . A great little machine.

### ⭐⭐⭐⭐ A fun product and a great gift
*by B***T on 2 December 2025*

Decent quality and value for money with a variety of stones. It's fun to use and looks okay. My only complaint is that the instructions are not good enough. Following the instructions exactly will not provide the required results, so it's best to search online for better advice from people who know what they're doing.

## 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 Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-09*