---
product_id: 344915911
title: "NATIONAL GEOGRAPHIC Rock Tumbler Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Great STEM Science Kit for Boys and Girls"
brand: "blue marble"
price: "112774 som"
currency: KGS
in_stock: true
reviews_count: 5
category: "Blue Marble"
url: https://www.desertcart.kg/products/344915911-national-geographic-rock-tumbler-kit-3lb-extra-large-capacity-3lb
store_origin: KG
region: Kyrgyzstan
---

# 75% quieter stainless steel lid Automatic shutoff timer & speed control 3LB extra-large capacity barrel NATIONAL GEOGRAPHIC Rock Tumbler Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Great STEM Science Kit for Boys and Girls

**Brand:** blue marble
**Price:** 112774 som
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC Rock Tumbler Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Great STEM Science Kit for Boys and Girls by blue marble
- **How much does it cost?** 112774 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/344915911-national-geographic-rock-tumbler-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:** Boost critical thinking and hand-eye coordination while crafting wearable art—perfect for the next-gen innovator.
- • **Set It & Forget It:** Customizable timer and speed controls let you perfect every polish without hovering.
- • **Whisper-Quiet Precision:** Experience 75% less noise with a leak-proof stainless steel barrel designed for peaceful creativity.
- • **Innovative GemFoam Shine:** Add reusable GemFoam for a brilliant, museum-quality finish that makes your gems pop.
- • **Master the Art of Gem Polishing:** Turn 3 lbs of rough gemstones into dazzling jewelry with professional-grade tumbling power.

## Overview

The NATIONAL GEOGRAPHIC Rock Tumbler Kit features a durable 3-pound capacity barrel with a quiet stainless steel lid, automatic shutoff timer, and adjustable speed settings. It includes 3 lbs of assorted rough gemstones, four polishing grits, five jewelry fastenings, and the innovative reusable GemFoam polisher for a brilliant finish. Designed for STEM learning and creative expression, this award-winning kit offers a professional tumbling experience ideal for beginners and enthusiasts alike.

## Description

Take your rock tumbling seriously with this top-of-the-line, three-pound capacity professional rock tumbling kit 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, keychain, 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 collection! National Geographic Toys is proud to provide only the highest quality products, each backed by a complete satisfaction guarantee so that you can buy with confidence. 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: The rock tumbler ran great for 4 weeks, now it has an E1 error even when no barrel is used. (Just the base running). Contacted the manufacturer and they sent a replacement the next day. This is a fine rock tumbler for a beginner. (We are)

## 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 |
| Assembly Required | No |
| Batteries Included | No |
| Batteries Required | Yes |
| Customer Reviews | 4.5 4.5 out of 5 stars (4,623) |
| Date First Available | 3 August 2020 |
| Educational Objective(s) | STEM, Concept Development Skills, Hand-Eye Coordination, Critical Thinking, Reasoning Exploratory Skills |
| Generic Name | Rock Tumbler Kit - 3 Lb. Extra Large Capacity Barrel |
| Included Components | 3lb Assorted Rough Gems, 4 Stages of Polishing Grit, 5 Jewelry Settings, Complete Rock Tumbler Kit, GemFoam Final Stage Rock Polisher, X-Large 3lb Capacity Barrel |
| Item Dimensions LxWxH | 32.4 x 26.2 x 17 Centimeters |
| Item Weight | 3 kg 700 g |
| Item model number | NGTUMBLER3LB |
| Language | English |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer recommended age | 8 years and up |
| Material Type(s) | Plastic Stainless Steel |
| Model Number | NGTUMBLER3LB |
| Net Quantity | 1.0 Count |
| Number of Game Players | 1 |
| Product Dimensions | 32.4 x 26.2 x 17 cm; 3.7 kg |
| Remote Control Included? | No |

## Product Details

- **Age Range (Description):** 8 years and up
- **Brand:** Blue Marble
- **Item dimensions L x W x H:** 32.4 x 26.2 x 17 Centimeters
- **Size:** One Size
- **Theme:** Geology

## Images

![NATIONAL GEOGRAPHIC Rock Tumbler Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Great STEM Science Kit for Boys and Girls - Image 1](https://m.media-amazon.com/images/I/91ThOdjpWqL.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 S***S on 13 November 2025*

The rock tumbler ran great for 4 weeks, now it has an E1 error even when no barrel is used. (Just the base running). Contacted the manufacturer and they sent a replacement the next day. This is a fine rock tumbler for a beginner. (We are)

### ⭐⭐⭐⭐⭐ Review
*by D***N on 7 November 2023*

For a drum that goes round and round, it’s expensive. It’s a very well built machine, reassuring quality and heft, and seals the liquid in very well. It’s not quiet. I’ve never had or seen one of these before, so it may be quiet in comparison to others, but it is not quiet. Have it in a cupboard in the kitchen and can hear it throughout all the downstairs. It’s not an annoying noise however, similar sound to a humming fridge so it does fade into the background very easily. Can’t really comment on the performance, it just rotates rocks, but it’s smooth and consistent. Came with an extra drive belt too which is a genuinely fantastic bit of thought. Highly recommend, based on my very limited experience.

## 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 Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-01-24*