---
product_id: 655664852
title: "Blue Marble NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Durable Leak-Proof Polisher With 7-Day Timer - Complete Tumbling Kit - Geology Hobby for Kids, Educational STEM Science Kit, Collection"
brand: "blue marble"
price: "฿27475"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/655664852-blue-marble-national-geographic-hobby-rock-tumbler-kit-durable-leak
store_origin: TH
region: Thailand
---

# includes 9 gemstone types & GemFoam polisher leak-proof stainless steel barrel 7-day automatic timer Blue Marble NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Durable Leak-Proof Polisher With 7-Day Timer - Complete Tumbling Kit - Geology Hobby for Kids, Educational STEM Science Kit, Collection

**Brand:** blue marble
**Price:** ฿27475
**Availability:** ✅ In Stock

## Summary

> 💎 Turn Rough Rocks into Coveted Gems—Because Your Collection Deserves to Shine!

## Quick Answers

- **What is this?** Blue Marble NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Durable Leak-Proof Polisher With 7-Day Timer - Complete Tumbling Kit - Geology Hobby for Kids, Educational STEM Science Kit, Collection by blue marble
- **How much does it cost?** ฿27475 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/655664852-blue-marble-national-geographic-hobby-rock-tumbler-kit-durable-leak)

## 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

- • **Next-Level Shine:** Innovative reusable GemFoam delivers dazzling, professional-grade polish.
- • **STEM Meets Style:** Educational science toy that transforms geology into wearable art.
- • **Set It & Forget It:** Powerful motor with customizable 7-day timer for effortless polishing.
- • **Leak-Proof & Durable:** Stainless steel lid and barrel ensure mess-free, long-lasting use.
- • **All-Inclusive Gemstone Kit:** 2 lbs of rough stones featuring 9 unique gemstones plus jewelry fastenings.

## Overview

The Blue Marble NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit is a premium, durable rock polisher designed for STEM learning and creative expression. Featuring a leak-proof stainless steel barrel with a 7-day automatic timer, it includes 2 pounds of assorted rough stones with nine gemstone varieties, polishing media, jewelry fastenings, and the exclusive reusable GemFoam for a brilliant finish. Perfect for kids and adults alike, this all-in-one kit combines educational value with hands-on fun, empowering users to craft stunning polished gems and unique jewelry pieces.

## Description

Blue Marble NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Durable Leak-Proof Polisher With 7-Day Timer - Complete Tumbling Kit - Geology Hobby for Kids, Educational STEM Science Kit, Collection

## Features

- CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This robust rock polisher 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.
- ALL-IN-ONE TUMBLING KIT - You get 1/2 pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, tumbler grit, a strainer, and our innovative new GemFoam polishing foam.
- USE GEMFOAM FOR DAZZLING RESULTS - This rock tumbling 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!
- HIGH-QUALITY EDUCATIONAL TOYS - We proudly make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience isn't stellar, we'll make it right!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Educational Objective(s) | STEM |
| Language: | English |
| Model Number | NGHOBBYTUMBLER2 |
| Assembly Required | No |
| Batteries Required | Yes |
| Batteries Included | No |
| tech_spec_battery_description_toys | Not required (mains powered) |
| Material Type(s) | Multiple |
| Remote Control Included? | No |
| Remote Control Type | None - Not Applicable |
| Colour | black/white |
| Product Dimensions | 33.3 x 12.7 x 20.7 cm; 1.9 kg |
| Item model number | NGHOBBYTUMBLER2 |
| Manufacturer recommended age | 8 years and up |
| Manufacturer | JMW Sales, Inc. |
| Country of Origin | USA |
| Item Weight | 1 kg 900 g |

## Product Details

- **Size:** Mittel
- **Brand:** Blue Marble
- **Theme:** Geology
- **Age Range (Description):** 8 years and up
- **Item dimensions L x W x H:** 33.3 x 12.7 x 20.7 Centimeters

## Images

![Blue Marble NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Durable Leak-Proof Polisher With 7-Day Timer - Complete Tumbling Kit - Geology Hobby for Kids, Educational STEM Science Kit, Collection - Image 1](https://m.media-amazon.com/images/I/915PyUpEsJL.jpg)

## Available Options

This product comes in different **Style Name** 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 Thailand*
*Store origin: TH*
*Last updated: 2026-02-11*