---
product_id: 520400090
title: "National Geographic Professional Rock Tumbler Kit – Extra Large 2 Lb. Barrel with 3-Speed Motor & 9-Day Timer – Geology DIY Kits for Adults, Rock Collection Hobby, Great Educational STEM Science Kit"
brand: "blue marble"
price: "€ 242.64"
currency: EUR
in_stock: true
url: https://www.desertcart.gr/products/520400090-national-geographic-professional-rock-tumbler-kit-extra-large-2-lb
store_origin: GR
region: Greece
---

# 75% noise reduction tech 9-day programmable timer 3-speed heavy-duty motor National Geographic Professional Rock Tumbler Kit – Extra Large 2 Lb. Barrel with 3-Speed Motor & 9-Day Timer – Geology DIY Kits for Adults, Rock Collection Hobby, Great Educational STEM Science Kit

**Brand:** blue marble
**Price:** € 242.64
**Availability:** ✅ In Stock

## Summary

> 💎 Turn rough rocks into dazzling gems—because your collection deserves to shine!

## Quick Answers

- **What is this?** National Geographic Professional Rock Tumbler Kit – Extra Large 2 Lb. Barrel with 3-Speed Motor & 9-Day Timer – Geology DIY Kits for Adults, Rock Collection Hobby, Great Educational STEM Science Kit by blue marble
- **How much does it cost?** € 242.64 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/520400090-national-geographic-professional-rock-tumbler-kit-extra-large-2-lb)

## 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

- • **Wear Your Wins:** Transform your polished stones into unique jewelry pieces with included fastenings—stand out with your own handcrafted gems.
- • **STEM-Driven Creativity:** Elevate your hobby with an award-winning kit designed to inspire science, education, and hands-on discovery.
- • **All-in-One Gem Creation:** Start immediately with 1 lb. of rough stones, 4 grit levels, jewelry fastenings, and the exclusive GemFoam polisher.
- • **Whisper-Quiet Innovation:** Experience 75% less noise thanks to a tire rubber layer and patented barrel rollers that keep things smooth and silent.
- • **Precision Tumbling Mastery:** Dial in perfect polish with a 3-speed motor and up to 12-day timer for flawless results every time.

## Overview

The National Geographic Professional Rock Tumbler Kit features a rugged, leak-proof 2 lb. barrel with patented rollers and a 3-speed motor paired with a programmable 9-day timer. It operates 75% quieter than typical tumblers and includes 1 lb. of rough stones, multiple grit levels, jewelry fastenings, and the exclusive reusable GemFoam polisher for brilliant shine. Perfect for STEM enthusiasts and hobbyists seeking a premium, educational rock tumbling experience.

## Description

National Geographic Professional Rock Tumbler Kit – Extra Large 2 Lb. Barrel with 3-Speed Motor & 9-Day Timer – Geology DIY Kits for Adults, Rock Collection Hobby, Great Educational STEM Science Kit

## Features

- RUGGED, DURABLE DESIGN - The improved leak-proof barrel features a large 2-lb. capacity and an updated roller system to keep the barrel centered. It’s also 75% quieter than most plastic barrels, thanks to a layer of tire rubber that absorbs sound.
- ALL-IN-ONE TUMBLING KIT - In addition to the professional-grade, redesigned tumbler, you get 1 lb. of rough rocks (9 different types), 5 jewelry fastenings, tumbler grit, a large strainer, and our GemFoam rock polisher to get you started right away!
- PRO-GRADE PERFORMANCE - A heavy-duty, 3-speed motor and programmable timer with day/hour settings deliver consistent results. The updated LED user interface lets you easily hone your settings for precise tumbling every time.
- USE GEMFOAM FOR DAZZLING RESULTS - This rock tumbler kit stands apart from others by including our reusable, patented 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 |
|---------------|-------|
| Product Dimensions | 40.79 x 27.51 x 14 cm; 2.88 kg |
| Manufacturer recommended age | 8 years and up |
| Item model number | NGPROTUM5 |
| Educational Objective(s) | STEM |
| Assembly Required | No |
| Batteries Required? | Yes |
| Batteries Included? | No |
| Material Type(s) | Multiple |
| Color | Black |
| ASIN | B0BSP9ZQWW |

## Product Details

- **Size:** L
- **Brand:** Blue Marble
- **Theme:** Geology
- **Age range (description):** 8 years and up
- **Item dimensions L x W x H:** 40.8 x 27.5 x 14 centimeters

## Images

![National Geographic Professional Rock Tumbler Kit – Extra Large 2 Lb. Barrel with 3-Speed Motor & 9-Day Timer – Geology DIY Kits for Adults, Rock Collection Hobby, Great Educational STEM Science Kit - Image 1](https://m.media-amazon.com/images/I/91VJHMBEPkL.jpg)

## Questions & Answers

**Q: What size motor? I have this tumber and the motor burned up and I am looking for a replacement motor.**
A: We are sorry to hear your motor has failed. Your tumbler includes a two year warranty.  Please contact us directly at help@natgeotoys.com where we can assist you further.

**Q: ¿Se puede hacer sea glass en esta máquina?**
A: ¡Sí!

**Q: have 1 rock, the size of a big baked potato. Could I put that in only and add more grit to accommodate it in a professional, machine. Just run it lo**
A: I don't think so.  The tumbler barrel will not be big enough to accommodate and allow the rock of that size to move freely.

**Q: where does one obtain wire and holders for jewelry made from the tumbled rocks?j**
A: Michaels craft store has some in the jewelry making department. Or you can check Amazon for jewelry findings and supplies.

## Frequently Bought Together

- National Geographic Professional Rock Tumbler Kit – Extra Large 2 Lb. Barrel with 3-Speed Motor & 9-Day Timer – Geology DIY Kits for Adults, Rock Collection Hobby, Great Educational STEM Science Kit
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- 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 Greece*
*Store origin: GR*
*Last updated: 2026-01-29*