---
product_id: 294396871
title: "Blue Marble 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: "₱20798"
currency: PHP
in_stock: true
reviews_count: 5
category: "Blue Marble"
url: https://www.desertcart.ph/products/294396871-blue-marble-national-geographic-rock-tumbling-kit-3lb-extra-large
store_origin: PH
region: Philippines
---

# 75% quieter leak-proof barrel Automatic shutoff timer 3LB extra-large capacity Blue Marble 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:** ₱20798
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Blue Marble 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?** ₱20798 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/294396871-blue-marble-national-geographic-rock-tumbling-kit-3lb-extra-large)

## 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: Great value tumbler. - I bought this a while ago now and it works perfectly. If you only want to polish small volumes then buy one!
Review: Worked great until it didn't. Great customer service. - 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 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 |
| Age range (description) | Kid,Adult |
| Best Sellers Rank | #149,102 in Toys ( See Top 100 in Toys ) #2,095 in Educational Science Kits |
| Brand | Blue Marble |
| Brand Name | Blue Marble |
| Customer Reviews | 4.5 out of 5 stars 4,651 Reviews |
| 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 |
| 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 |
| Item dimensions L x W x H | 32.4 x 26.2 x 17 centimeters |
| Item weight | 3.7 Kilograms |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188.0 |
| Manufacturer Minimum Age (MONTHS) | 96.0 |
| Material Type | default_no_selection_value |
| 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

![Blue Marble 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/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

### ⭐⭐⭐⭐⭐ Great value tumbler.
*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!

### ⭐⭐⭐⭐⭐ Worked great until it didn't. Great customer service.
*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)

### ⭐⭐⭐⭐⭐ Fun for people who enjoy cute hobbies
*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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ph/products/294396871-blue-marble-national-geographic-rock-tumbling-kit-3lb-extra-large](https://www.desertcart.ph/products/294396871-blue-marble-national-geographic-rock-tumbling-kit-3lb-extra-large)

---

*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-03-06*