---
product_id: 222572366
title: "National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby"
brand: "blue marble"
price: "$277.84"
currency: USD
in_stock: true
category: "Blue Marble"
url: https://www.desertcart.us/products/222572366-national-geographic-3-lb-rock-tumbler-kit-for-kids-adult
store_origin: US
region: United States of America
---

# 3 lb. capacity barrel with 9 gemstone types 9-day programmable timer for hands-free tumbling 3-speed motor for precise control National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby

**Brand:** blue marble
**Price:** $277.84
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, rock your world!

## Quick Answers

- **What is this?** National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby by blue marble
- **How much does it cost?** $277.84 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/222572366-national-geographic-3-lb-rock-tumbler-kit-for-kids-adult)

## 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

- • **Award-Winning STEM Fun:** From the Toy Association’s Toy of the Year winner, fostering critical thinking and hands-on learning.
- • **Quiet & Durable Design:** Stainless steel lid and leak-proof barrel reduce noise by 75%, built to last through countless projects.
- • **Complete All-in-One Kit:** Includes 3 lbs. of raw rocks, polishing grit, GemFoam, and jewelry fastenings for instant creativity.
- • **Effortless Gemstone Creation:** Transform rough rocks into dazzling gems with ease—perfect for beginners and pros alike.
- • **Precision Control, Set & Forget:** 3-speed motor and 9-day timer let you customize your polish without constant supervision.

## Overview

The National Geographic 3 Lb. Rock Tumbler Kit combines a powerful 3-speed motor, a large 3 lb. capacity barrel, and a 9-day timer to deliver professional-grade gemstone polishing. Designed for kids and adults, it includes 3 lbs. of assorted rough gems, polishing grit, reusable GemFoam for extra shine, and jewelry fastenings. Its durable, quiet stainless steel lid and leak-proof barrel make it a standout in STEM education and creative hobbies.

## Description

desertcart.com: National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby : Toys & Games

## 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.
- 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 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!
- AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08DL95CWL |
| Age Range Description | 8 years and up |
| Best Sellers Rank | #12,795 in Toys & Games ( See Top 100 in Toys & Games ) #8 in Kids' Rock Tumblers |
| Brand Name | Blue Marble |
| Customer Reviews | 4.6 4.6 out of 5 stars (5,052) |
| Educational Objective | STEM, Concept Development Skills, Hand-Eye Coordination, Critical Thinking, Reasoning Exploratory Skills |
| Included Components | Complete Rock Tumbler Kit, 3lb Assorted Rough Gems, 4 Stages of Polishing Grit,5 Jewelry Settings,GemFoam |
| Item Dimensions | 12.76 x 10.31 x 6.69 inches |
| Item Type Name | Rock Tumbler Kit - 3 Lb. Extra Large Capacity Barrel |
| Item Weight | 3.7 kg |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 96 |
| Manufacturer Part Number | NGTUMBLER3LB |
| Material Type | Plastic, Stainless Steel |
| Model Number | NGTUMBLER3LB |
| Set Name | Set |
| Size | One Size |
| Sub Brand | National Geographic |
| Theme | Geology |
| UPC | 816448028694 |
| Unit Count | 1 Count |

## Images

![National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby - Image 1](https://m.media-amazon.com/images/I/91Ijz8tKNVL.jpg)
![National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby - Image 2](https://m.media-amazon.com/images/I/81TDJ3b84UL.jpg)
![National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby - Image 3](https://m.media-amazon.com/images/I/81-mwtFqwcL.jpg)
![National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby - Image 4](https://m.media-amazon.com/images/I/91oafLbp20L.jpg)
![National Geographic 3 Lb. Rock Tumbler Kit for Kids and Adult Beginners | 3 Lb. Capacity Barrel, 3-Speed Motor, 9-Day Timer, Rough Rocks and Polishing Grit, Rock Polisher, Geology Hobby - Image 5](https://m.media-amazon.com/images/I/81ZdyUn2XLL.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.

## 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 United States of America*
*Store origin: US*
*Last updated: 2026-07-28*