---
product_id: 76263492
title: "Blue Marble National Geographic Hobby Rock Tumbler Kit- Multi Color, Kids"
brand: "blue marble"
price: "¥73358"
currency: JPY
in_stock: true
category: "Blue Marble"
url: https://www.desertcart.jp/products/76263492-blue-marble-national-geographic-hobby-rock-tumbler-kit-multi-color
store_origin: JP
region: Japan
---

# 4-stage polishing grit system includes 9 real rough gemstones automatic shutoff timer Blue Marble National Geographic Hobby Rock Tumbler Kit- Multi Color, Kids

**Brand:** blue marble
**Price:** ¥73358
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, sparkle your story.

## Quick Answers

- **What is this?** Blue Marble National Geographic Hobby Rock Tumbler Kit- Multi Color, Kids by blue marble
- **How much does it cost?** ¥73358 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/76263492-blue-marble-national-geographic-hobby-rock-tumbler-kit-multi-color)

## 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

- • **All-in-One Rock Lab:** Complete kit with tumbler, grits, sifter, and educational guide—no extra purchases needed.
- • **Effortless Precision:** One-touch settings and automatic shutoff ensure perfect polish every time.
- • **Versatile Creativity:** Polish sea glass, metal scraps, and more—unleash your inner artisan beyond rocks.
- • **Expand Your Geology IQ:** Learn the science behind gems with a fun, hands-on experience designed for curious minds.
- • **Transform Rocks into Jewels:** Turn everyday stones into dazzling, museum-quality gems with ease.

## Overview

The Blue Marble National Geographic Hobby Rock Tumbler Kit is a comprehensive, easy-to-use rock polishing set designed for kids 8 and up. Featuring a 4-stage polishing grit system, automatic shutoff timer, and nine types of real rough gemstones, this kit offers an immersive educational experience in geology. Perfect for budding collectors and creative explorers, it includes everything needed to transform ordinary stones into stunning polished gems, while also enabling polishing of sea glass and metal scraps.

## Description

Learn all about gems and rock tumbling with National Geographic's best selling rock tumbling kit. Make any stone sparkle, investigate rock formations, and create your own custom jewelry that is sure to leave an impression. An absolute necessity for any rock collector, this kit will bring your passion to the next level. But the fun doesn't stop there! This tumbler can be used to make sea glass, polish metal scraps, and more! Join National Geographic and explore your world, and all its hidden beauty.

## Features

- MAKE ANY STONE SPARKLE and polish everyday rocks into dazzling gemstones
- ENHANCE YOUR ROCK COLLECTION or start a new one! Makes all rocks shine like professionally polished stones
- EVERYTHING IS INCLUDED in the kit; tumbler, four polishing grits, sifter, learning guide PLUS nine types of real rough gemstones
- EASY TO USE with our simple instructions, one-touch settings and an automatic shutoff timer
- 100% SATISFACTION GUARANTEED - For 129 years, National Geographic has been committed to providing fun and fascinating educational opportunities for children

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01LQCIL88 |
| Age Range Description | 96 months to up |
| Best Sellers Rank | #26,061 in Toys & Games ( See Top 100 in Toys & Games ) #540 in Science Toys & Kits |
| Brand | Blue Marble |
| Country of Origin | USA |
| Customer Reviews | 4.5 4.5 out of 5 stars (24,945) |
| Educational Objective | Geology |
| Global Trade Identification Number | 00816448020421 |
| Included Components | AC Power Adapter, Jewelry Fastenings, Learning Guide, Rock Tumbler, Rough Gemstones (1/2 lb), Strainer, Tumbling Grit (4 grades) |
| Is Assembly Required | No |
| Item Dimensions | 35.1 x 12.4 x 20.5 Centimeters |
| Item Type Name | Hobby Rock Tumbler |
| Item Weight | 2.3 kg |
| Manufacturer | JMW Sales, Inc |
| Manufacturer Part Number | NGHOBBYTUMBLER |
| Manufacturer Warranty Description | No Warranty |
| Manufacturer recommended age | 8 years and up |
| Material | Metal,Gems |
| Model Number | NGHOBBYTUMBLER |
| Number of Items | 1 |
| Size | Medium |
| Theme | Geology |
| UPC | 816448020421 |

## Product Details

- **Age Range (Description):** 96 months to up
- **Brand:** Blue Marble
- **Item dimensions L x W x H:** 35.1 x 12.4 x 20.5 Centimeters
- **Size:** Medium
- **Theme:** Geology

## Images

![Blue Marble National Geographic Hobby Rock Tumbler Kit- Multi Color, Kids - Image 1](https://m.media-amazon.com/images/I/516Og9vx0JL.jpg)
![Blue Marble National Geographic Hobby Rock Tumbler Kit- Multi Color, Kids - Image 2](https://m.media-amazon.com/images/I/51JFACvDm8L.jpg)
![Blue Marble National Geographic Hobby Rock Tumbler Kit- Multi Color, Kids - Image 3](https://m.media-amazon.com/images/I/51eT28SNp9L.jpg)
![Blue Marble National Geographic Hobby Rock Tumbler Kit- Multi Color, Kids - Image 4](https://m.media-amazon.com/images/I/51pyytX-vTL.jpg)
![Blue Marble National Geographic Hobby Rock Tumbler Kit- Multi Color, Kids - Image 5](https://m.media-amazon.com/images/I/51yub84k7zL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Is it 230volts 50 hz please let me know**
A: Yes this is working on 230 volts 50 Hz.

**Q: What is the actual cost of rock tumbler ?. Sometims it showed 5+thousand, sometimes 13+ Sometimes 18 + flirting price...**
A: Now a days to import form USA or buy at Amazon is very expensive

**Q: Can I use it for kno3 powdering**
A: Actually my requirement is different. I have no idea about kno3 powdering.

**Q: What is the life cycle of polishing grit**
A: Single use only.

## Frequently Bought Together

- National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults
- 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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**Shop now:** [https://www.desertcart.jp/products/76263492-blue-marble-national-geographic-hobby-rock-tumbler-kit-multi-color](https://www.desertcart.jp/products/76263492-blue-marble-national-geographic-hobby-rock-tumbler-kit-multi-color)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-07*