---
product_id: 34238823
title: "National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults"
brand: "blue marble"
price: "34029 som"
currency: KGS
in_stock: true
reviews_count: 8
category: "Blue Marble"
url: https://www.desertcart.kg/products/34238823-national-geographic-rock-tumbler-kit-hobby-edition-includes-rough-gemstones
store_origin: KG
region: Kyrgyzstan
---

# One-touch timer with auto shutoff 75% quieter leakproof barrel Durable motor, built to last National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults

**Brand:** blue marble
**Price:** 34029 som
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, rock your world!

## Quick Answers

- **What is this?** National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults by blue marble
- **How much does it cost?** 34029 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/34238823-national-geographic-rock-tumbler-kit-hobby-edition-includes-rough-gemstones)

## 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

- • **Set It and Forget It:** One-touch timer and automatic shutoff make rock tumbling effortless and foolproof.
- • **Whisper-Quiet Operation:** Enjoy a peaceful workspace with a barrel that’s 75% quieter than competitors.
- • **Complete STEM Experience:** Includes 9 real rough gemstones, 4 polishing grits, and a full-color learning guide for hands-on geology fun.
- • **Award-Winning Quality & Support:** Backed by Toy of the Year winner Blue Marble and responsive U.S.-based customer service.
- • **Transform Rough Rocks into Dazzling Gems:** Turn everyday stones into polished treasures with ease and style.

## Overview

The National Geographic Rock Tumbler Kit – Hobby Edition is a premium STEM science kit designed for geology enthusiasts aged 8 and up. Featuring a durable, whisper-quiet motor and leakproof barrel, it includes 9 types of rough gemstones, 4 polishing grits, a sifter, and a detailed learning guide. With easy one-touch controls and automatic shutoff, it offers a seamless tumbling experience that transforms rough stones into stunning polished gems. Perfect for kids and adults alike, this award-winning kit combines education, creativity, and fun in one complete package.

## Description

Buy National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults: Rock Tumblers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Bought for 13 year old - Amazing rock tumbler—turned rough stones into gorgeous polished gems! This tumbler is a total winner for beginners and hobbyists alike. It runs super quietly (barely noticeable even in the living room), stays cool during long cycles, and the barrel seals perfectly—no leaks or mess. I followed the standard 4-6 week process with the included grit/polish steps, and the results are stunning: dull, jagged rocks came out mirror-shiny and smooth. Easy to use and clean, the motor is strong and consistent—no stalling with a full load. Great build quality for the price—feels durable and reliable. My family loves checking the progress every week, and now we have a beautiful collection of tumbled stones for jewelry and display. If you’re into rockhounding or just want a fun, satisfying project, this is fantastic. Highly recommend!
Review: Awesome tumbler, amazing customer service - I originally purchased this in March 2024. I used it pretty regularly for 9 months and it worked wonderfully and I loved the results I got with my rocks. I paused using it for a few months and when I tried to start tumbling some rocks again, the tumbler would barely start moving and then would stop all together. Opening it up and cleaning it up seemed to help for a few minutes but then it would stop again. I opened it again and the connections all seemed fine but I wondered if the motor was just worn out. I contacted the manufacturer Think Blue Marble and they immediately replied to my email saying that it sounded like it was a weight sensor issue. They offered to send me a one time replacement free of charge! I provided my address and within 72 hours of my initial email I had received a brand new natgeo tubmler set in the mail! 100 stars for amazing customer service and standing behind their product! I'm just about to finish up the first stage in this new tumbler. Thank you Think Blue Marble!!

## Features

- CREATE YOUR OWN GEMSTONES - Make any stone sparkle and polish everyday rocks into dazzling gemstones! This rock tumbler kit 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 – Our high-quality tumblers are made with a durable motor that’s designed to last for years. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. An excellent STEM activity for kids.
- A COMPLETE HOBBY TUMBLING KIT - Everything you need to create polished gemstones: the tumbler, four polishing grits, sifter, nine types of real rough gemstones, plus a detailed full-color learning guide. Makes a great gift for girls and boys!
- EASY TO USE – Simple instructions and one-touch settings make rock tumbling fun and easy. Control the number of days for each tumbling cycle with the one-touch timer and automatic shutoff feature, set it and forget it! This is a great gift for kids.
- 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 | B01LQCIL88 |
| Age Range Description | 8 years and up |
| Best Sellers Rank | #4,057 in Toys & Games ( See Top 100 in Toys & Games ) #2 in Kids' Rock Tumblers |
| Brand Name | Blue Marble |
| Customer Reviews | 4.5 out of 5 stars 25,704 Reviews |
| Educational Objective | STEM |
| Global Trade Identification Number | 00816448020421 |
| Included Components | AC Power Adapter, Jewelry Fastenings, Learning Guide, Rock Tumbler, Rough Gemstones (1/2 lb), Strainer, Tumbling Grit (4 grades) |
| Item Dimensions | 13.81 x 4.88 x 8.06 inches |
| Item Type Name | Rock Tumbler Kit – Hobby Edition |
| Item Weight | 5.07 Pounds |
| Manufacturer | JMW Sales, Inc |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 96 |
| Manufacturer Part Number | NGHOBBYTUMBLER |
| Manufacturer Warranty Description | No Warranty |
| Material Type | Plastic |
| Model Number | NGHOBBYTUMBLER |
| Set Name | Hobby |
| Size | One Size |
| Sub Brand | National Geographic |
| Theme | Rock Tumbling |
| UPC | 816448020421 |
| Unit Count | 1.0 Count |

## Images

![National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults - Image 1](https://m.media-amazon.com/images/I/91kPaJp1AfL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: What is the power consumption of this unit over a week of continuous use? (in usa on 110v). thank you.**
A: This takes .3 Amps, so (watts = amps x volts) OR watts = .3 x 110 which equals33 watts.  Now for one week would equal 33 watts x 7 days x 24 hours =5544 watts or 5.54 kilowatts for one week.At $.16 per kilowatt it comes to $.89 per week.

**Q: What the difference between this and the starter kit?**
A: There are two main differences:The Hobby Rock Tumbler has a rubber tumbling barrel with a stainless steel cap, which reduces noise and is more durable. The Starter Kit Rock Tumbler has a plastic barrel. The Hobby Rock Tumbler also has a keypad for setting the number of days you would like it to tumble, where as the Starter Kit Rock Tumbler's setting options are on/off. Thank you for your inquiry.

**Q: What pound tumbler is this product?**
A: Dearest National Geographic.... why would you only send 1# of rocks with a two pound tumbler?

**Q: Can i buy extra grit without the rocks. we have many rocks from "mining" gemstones that i would love to polish. what do you recommend?**
A: I recommend you follow the rock tumbler hobbiest MIchigan Rocks on Youtube. He's a good wealth of information for anyone getting into rock tumblers. He and other's mention that the polish from National Geographic is not good. I would go with rock tumbler polish offered by Polly Plastics.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bought for 13 year old
*by N***E on January 29, 2026*

Amazing rock tumbler—turned rough stones into gorgeous polished gems! This tumbler is a total winner for beginners and hobbyists alike. It runs super quietly (barely noticeable even in the living room), stays cool during long cycles, and the barrel seals perfectly—no leaks or mess. I followed the standard 4-6 week process with the included grit/polish steps, and the results are stunning: dull, jagged rocks came out mirror-shiny and smooth. Easy to use and clean, the motor is strong and consistent—no stalling with a full load. Great build quality for the price—feels durable and reliable. My family loves checking the progress every week, and now we have a beautiful collection of tumbled stones for jewelry and display. If you’re into rockhounding or just want a fun, satisfying project, this is fantastic. Highly recommend!

### ⭐⭐⭐⭐⭐ Awesome tumbler, amazing customer service
*by E***S on June 23, 2025*

I originally purchased this in March 2024. I used it pretty regularly for 9 months and it worked wonderfully and I loved the results I got with my rocks. I paused using it for a few months and when I tried to start tumbling some rocks again, the tumbler would barely start moving and then would stop all together. Opening it up and cleaning it up seemed to help for a few minutes but then it would stop again. I opened it again and the connections all seemed fine but I wondered if the motor was just worn out. I contacted the manufacturer Think Blue Marble and they immediately replied to my email saying that it sounded like it was a weight sensor issue. They offered to send me a one time replacement free of charge! I provided my address and within 72 hours of my initial email I had received a brand new natgeo tubmler set in the mail! 100 stars for amazing customer service and standing behind their product! I'm just about to finish up the first stage in this new tumbler. Thank you Think Blue Marble!!

### ⭐⭐⭐⭐⭐ Beach Glass Tumbling!
*by B***O on January 5, 2026*

I haven’t seen a review (yet) that’s mentioned using this rock tumbler to tumble/smooth sea/beach glass.. so here’s mine & I hope this helps someone out there :) If you’re interested.. I’ve collected so much glass over my years of searching on Lake Erie. Majority of my glass is smooth or frosted over (chef’s-kiss kinda pieces), but of course I have not as-smooth pieces too. I know people say “it’s not ready,” but IMO, it’s ready if my bag is open and it’s not a literal shard of glass lol. Anyways. I’ve heard of people DIYing their own “sea” glass. I FINALLY purchased this, after 2 years of just thinking about getting one. Here’s how I feel about it (using beach glass, not rocks): So far, I’ve been using it almost night & day for about 1-2 weeks. 100/10. If you don’t have a basement, garage, or shed with an outlet, just know it’s a loud & noisy thang! It does wonders for my unfinished beach glass! I only left those pieces in the tumbler for 10-12 hrs (I believe), and they’re perfect now!! Lastly, we listen and we don’t judge: I didn’t read too far into the “what’s included” section, so I was honestly just expecting the tumbler 😂. I love that it came with necklace options, the rocks themselves, an extra rubber- chain(?), and the 4 grit packets. You certainly get your money’s worth. If you made to the end, thanks for taking the time to learn more! :)

## Frequently Bought Together

- National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults
- 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: 2026-03-09*