---
product_id: 294396871
title: "NATIONAL GEOGRAPHIC Rock Tumbling Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, an Educational STEM Science Kit"
brand: "blue marble"
price: "10362865₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Blue Marble"
url: https://www.desertcart.vn/products/294396871-national-geographic-rock-tumbling-kit-3lb-extra-large-capacity-3lb
store_origin: VN
region: Vietnam
---

# 75% quieter leak-proof barrel Automatic shutoff timer 3LB extra-large capacity NATIONAL GEOGRAPHIC Rock Tumbling Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, an Educational STEM Science Kit

**Brand:** blue marble
**Price:** 10362865₫
**Availability:** ✅ In Stock

## Summary

> 💎 Elevate your hobby: polish, shine, and own the gem game!

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC Rock Tumbling Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, an Educational STEM Science Kit by blue marble
- **How much does it cost?** 10362865₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/294396871-national-geographic-rock-tumbling-kit-3lb-extra-large-capacity-3lb)

## 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:** Educational and fun, this kit sharpens critical thinking while creating wearable art—join the rock tumbling renaissance.
- • **Set It and Forget It:** Customizable time and speed controls with automatic shutoff let you multitask without missing a beat.
- • **Whisper-Quiet Operation:** Enjoy a 75% noise reduction thanks to the leak-proof stainless steel barrel—perfect for home or office.
- • **Innovative GemFoam Shine:** Add the reusable GemFoam for a brilliant, museum-quality polish that makes your gems pop.
- • **Master the Art of Gem Polishing:** Turn 3 pounds of rough gemstones into dazzling jewelry with professional-grade tumbling power.

## Overview

The Blue Marble National Geographic Rock Tumbling Kit offers a professional 3LB capacity with 9 types of rough gemstones, 4-stage polishing grits, and a leak-proof, noise-reducing barrel. Featuring customizable speed and timer controls plus the exclusive reusable GemFoam for superior shine, this STEM-focused kit combines educational value with hands-on creativity to transform raw stones into stunning jewelry pieces.

## Description

Take your rock tumbling seriously with this top-of-the-line, three-pound capacity professional rock polisher from National Geographic!This kit has all the features and accessories you’ll need to master rock tumbling, start an extraordinary rock collection, and create beautiful jewelry.Contents and Features:- Automatic shutoff timer- Reliable, long-lasting motor- Leak-proof tumbler barrel- Noise reduced operation (75% quieter than plastic barrels)- Plenty of stones (3 lb) and four levels of grit- 5 Jewelry Fastenings- GemFoam, the most innovative way to add dazzling shine to your polished stones!This high-quality tumbler allows you to set your speed and tumbling time. When the time expires, your tumbler will automatically shut-off, allowing you to choose the perfect amount of tumble time for each grit stage.Plus, our redesigned tumbling barrel dampens sound better than most tumblers out there. The rough rocks provided (3 lbs) contain nine different gemstones from around the world, and our tumbling grit is labeled by tumbling stage to make the process even easier!Choose your favorite gems and turn them into jewelry with the included necklace, key chain, ring, and two clip-on earring fastenings inside.And don't forget about GemFoam, our exclusive new way to add dazzling shine to your polished rocks! Use GemFoam just like tumbling grit, simply add it to the barrel with your stones and water, then three days later marvel at the shine! GemFoam is reusable too, allowing you to create a truly impressive gemstone collectionNational Geographic Toys makes the highest quality hands-on science toys, and all products are backed by exceptional service.About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.

Review: I bought this a while ago now and it works perfectly. If you only want to polish small volumes then buy one!
Review: Ho 67 anni, nel 2023 ho acquistato questo articolo e, con mia grande sorpresa, mi ha regalato 1 anno e mezzo di grandi soddisfazioni! Ho burattato semplicemente sassi di mare, nessuna pietra di valore dunque, ma la soddisfazione forse è proprio questa: "mettere a nudo la loro bellezza nascosta"! Grazie a questa macchina ho aggiunto un super hobby al mio tempo di insegnante volontaria in pensione, proverò con il mercatino per la scuola a far conoscere ai bambini questa bellissima attività! Tre giorni fa la macchina ha avuto un problema, ma è stato subito risolto, ringrazio national geographic per la sollecita e graditissima soluzione trovata per me! CONSIGLIATISSIMO!

## Features

- CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This professional 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 is 75% quieter overall than plastic tumbler barrels.
- INCLUDES 3 LBS. OF ROCKS & MORE - This tumbling kit comes with everything you need: 3 lbs. of raw rocks with 9 types of gemstones, 5 jewelry fastenings, grit, strainer & GemFoam for a dazzling shine!
- USE GEMFOAM FOR DAZZLING RESULTS - This rock polishing 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 | B08DL95CWL |
| Age Range Description | Kid,Adult |
| Best Sellers Rank | #13,620 in Toys ( See Top 100 in Toys ) #180 in Educational Science Kits |
| Brand Name | Blue Marble |
| Customer Reviews | 4.5 4.5 out of 5 stars (4,702) |
| Educational Objective | STEM, Concept Development Skills, Hand-Eye Coordination, Critical Thinking, Reasoning Exploratory Skills |
| Included Components | 3LB Rock Polisher, Rough Gemstones, five jewelry fastenings, 4-stage grit, a strainer, GemFoam rock polisher |
| Is Assembly Required | No |
| Item Dimensions | 32.4 x 26.2 x 17 centimeters |
| Item Type Name | 4 Polishing Grits, Jewelry Fastenings, an Educational STEM Science Kit |
| Item Weight | 3.7 Kilograms |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188.0 |
| Manufacturer Minimum Age (MONTHS) | 96.0 |
| Manufacturer Part Number | NGTUMBLER3LB |
| Material Type | default_no_selection_value |
| Model Number | NGTUMBLER3LB |
| Set Name | Set |
| Size | L |
| Sub Brand | National Geographic |
| Theme | Science |
| UPC | 816448028694 |
| Unit Count | 1.0 Count |

## Product Details

- **Age range (description):** Kid,Adult
- **Brand:** Blue Marble
- **Item dimensions L x W x H:** 32.4 x 26.2 x 17 centimeters
- **Size:** L
- **Theme:** Science

## Images

![NATIONAL GEOGRAPHIC Rock Tumbling Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, an Educational STEM Science Kit - Image 1](https://m.media-amazon.com/images/I/91Ijz8tKNVL.jpg)

## Questions & Answers

**Q: Warranty on motor**
A: All our tumblers include a 1-2 year warranty.  For warranty assistance please contact us using the contact information found on the bottom of the package or in the instruction guide.

**Q: Why is it saying undeliverable to any of my US addresses?**
A: I experienced the same; it would not ship to my po box.  I had it shipped to my daughter's house; it seem to like her address.

**Q: What are the inside measurements of the 3lb barrel?**
A: Our 3 lb barrel is approximately 3.25" x 5.5"

**Q: How much does the barrel weigh?**
A: Our 3 pound barrel with lid weighs 2 pounds.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***G on 18 July 2025*

I bought this a while ago now and it works perfectly. If you only want to polish small volumes then buy one!

### ⭐⭐⭐⭐⭐ Review
*by C***N on 5 March 2025*

Ho 67 anni, nel 2023 ho acquistato questo articolo e, con mia grande sorpresa, mi ha regalato 1 anno e mezzo di grandi soddisfazioni! Ho burattato semplicemente sassi di mare, nessuna pietra di valore dunque, ma la soddisfazione forse è proprio questa: "mettere a nudo la loro bellezza nascosta"! Grazie a questa macchina ho aggiunto un super hobby al mio tempo di insegnante volontaria in pensione, proverò con il mercatino per la scuola a far conoscere ai bambini questa bellissima attività! Tre giorni fa la macchina ha avuto un problema, ma è stato subito risolto, ringrazio national geographic per la sollecita e graditissima soluzione trovata per me! CONSIGLIATISSIMO!

### ⭐⭐⭐⭐⭐ Review
*by A***ー on 7 March 2024*

配送都合を調整して頂き、スムーズに受け取り完了出来ました。

## Frequently Bought Together

- National Geographic Rock Tumbler Kit - 3 Lb. Extra Large Capacity Barrel with 3-Speed Motor & 9-Day Timer, Kit Includes Rocks for Tumbling and Rock Polisher Grit, Rock Tumbler for Adults and Kids
- 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 Vietnam*
*Store origin: VN*
*Last updated: 2026-05-18*