---
product_id: 34394992
title: "National Geographic Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher - Complete Rock Tumbling Kit with 4-Stage Silicon Carbide Grit - Geology Hobby, Rocks & Crystals (Amazon Exclusive)"
brand: "blue marble"
price: "2677106₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Blue Marble"
url: https://www.desertcart.vn/products/34394992-national-geographic-starter-rock-tumbler-kit-durable-leak-proof-rock
store_origin: VN
region: Vietnam
---

# durable leak-proof rubber-lined barrel ½ lb rough rocks with 9 gemstone types 4-stage silicon carbide grit polishing National Geographic Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher - Complete Rock Tumbling Kit with 4-Stage Silicon Carbide Grit - Geology Hobby, Rocks & Crystals (Amazon Exclusive)

**Brand:** blue marble
**Price:** 2677106₫
**Availability:** ✅ In Stock

## Summary

> 💎 Polish your passion, rock your world!

## Quick Answers

- **What is this?** National Geographic Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher - Complete Rock Tumbling Kit with 4-Stage Silicon Carbide Grit - Geology Hobby, Rocks & Crystals (Amazon Exclusive) by blue marble
- **How much does it cost?** 2677106₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/34394992-national-geographic-starter-rock-tumbler-kit-durable-leak-proof-rock)

## 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

- • **All-Inclusive Rock Lab:** Comes with rough stones, jewelry fastenings, and a full-color educational guide—everything you need to start.
- • **Learn While You Create:** Step-by-step instructions and fascinating geology facts make this a perfect STEM hobby for curious minds.
- • **Built to Endure Every Batch:** Heavy-duty motor and leak-proof barrel ensure quiet, long-lasting tumbling sessions.
- • **Award-Winning Quality & Support:** From the Toy Association’s Toy of the Year winner with dedicated U.S. customer care for peace of mind.
- • **Transform Rough Rocks into Gems:** Effortlessly polish stones with a 4-stage grit system for professional-quality shine.

## Overview

The National Geographic Starter Rock Tumbler Kit is a complete, durable, and leak-proof rock polishing system featuring a 4-stage silicon carbide grit process. Designed for beginners and hobbyists alike, it includes ½ pound of rough stones with nine gemstone varieties, jewelry fastenings, and an educational guide. Recognized for quality and backed by award-winning customer support, this kit turns raw rocks into stunning polished gems while fostering creativity and STEM learning.

## Description

desertcart.com: National Geographic Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher - Complete Rock Tumbling Kit with 4-Stage Silicon Carbide Grit - Geology Hobby, Rocks & Crystals (desertcart Exclusive) : Toys & Games

Review: awesome - awesome, good starter
Review: I'd like to say it's for my kiddos but really - I was very excited to get my tumbler. I'd like to say it's for my kiddos but really, I'm the rock hound. I only wanted to get rid of the rough edges on my agates so they still looked natural so I ran about 3 sets of rocks through the 1st grit. Then I decided to go through all 4 stages with my best rocks. We made it to the 3rd stage and my yellow barrel started to leak. Originally it closed up so tight it was a little work to get it opened so I was a bit surprised. I cleaned it up really well hoping that would make a difference and it would close better but nothing has worked. I called the company today and she sent a new one within a few hours...it's already on it's way. They seemed truly excited to replace the broken piece and seemed to have no interest in placing blame or putting me out with a million questions. They were way more interested in making sure I had a working product and that I was happy. Customer Service was great and I'm very happy with the product so far. Even if it leaks again, I have no doubt I'll be taken care of.

## Features

- CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This starter 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 allows you to tumble multiple batches of rocks. An improved, leak-proof barrel is lined with rubber for quieter operation while tumbling on the sturdy tumbler base.
- ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get ½ a pound of rough rocks with nine different types of gemstones inside, five jewelry fastenings, and our four-stage rock polishing grit.
- EASY TO USE AND EDUCATIONAL - Detailed tumbler instructions lead you step-by-step through the rock tumbling process, A full-color learning guide details how rocks are naturally polished and has fascinating facts about the gemstones in the kit.
- 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 | B01I56RV0C |
| Best Sellers Rank | #8,514 in Toys & Games ( See Top 100 in Toys & Games ) #4 in Kids' Rock Tumblers |
| Customer Reviews | 4.3 4.3 out of 5 stars (10,976) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.18 pounds |
| Item model number | NGTUMBLER2 |
| Manufacturer | Discover with Dr. Cool |
| Manufacturer recommended age | 8 - 12 years |
| Product Dimensions | 10.98 x 5.2 x 12 inches |
| Release date | October 13, 2017 |

## Images

![National Geographic Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher - Complete Rock Tumbling Kit with 4-Stage Silicon Carbide Grit - Geology Hobby, Rocks & Crystals (Amazon Exclusive) - Image 1](https://m.media-amazon.com/images/I/81HyxXKFvrL.jpg)

## Questions & Answers

**Q: Can this be used to tumble glass to make sea glass?**
A: Yes! I have a spot where I find lots of shards of glass and rare colors but they just aren’t “cooked” enough. I got the tumbler to finish them. The glass I have is real sea glass not fake nor bottles I break (which I have never done and won’t because I like that I find my glass and know it has a story from whence it came!) I have found it along beaches and rivers but it just needed some extra time to be perfect but because of the color rarity I wasn’t going to toss it back!

**Q: Where can I buy more grit?**
A: Amazon (there are alternatives if you want to search for a specific one you need: coarse (60/90 grit), medium (150/220 grit), fine (500 grit), rock polish (TXP aluminum oxide) but below are two choices that will contain all you’d need, are approx the same lbs of material, and will work equally well):

https://www.amazon.com/dp/B01MRKI4W0/ref=cm_sw_r_cp_api_i_8luBDbAX0440H

https://www.amazon.com/dp/B07PYFGT44/ref=cm_sw_r_cp_api_i_SkuBDbZFZBTVW

**Q: How many pounds/ounces of rocks can you put into the barrel with grit for tumbling?**
A: The Rock Tumbler can hold 1lb (16oz) of rocks in the barrel with the grit for tumbling.Thank you for your inquiry!

**Q: How long does it take from start to finish? And can you use any rocks or only the ones that come with it**
A: Each grade of sand is a different grit. About 3 weeks and one extra week to polish. You can run any rocks even ones that you find.

## Customer Reviews

### ⭐⭐⭐⭐⭐ awesome
*by F***3 on January 11, 2026*

awesome, good starter

### ⭐⭐⭐⭐⭐ I'd like to say it's for my kiddos but really
*by A***R on October 17, 2017*

I was very excited to get my tumbler. I'd like to say it's for my kiddos but really, I'm the rock hound. I only wanted to get rid of the rough edges on my agates so they still looked natural so I ran about 3 sets of rocks through the 1st grit. Then I decided to go through all 4 stages with my best rocks. We made it to the 3rd stage and my yellow barrel started to leak. Originally it closed up so tight it was a little work to get it opened so I was a bit surprised. I cleaned it up really well hoping that would make a difference and it would close better but nothing has worked. I called the company today and she sent a new one within a few hours...it's already on it's way. They seemed truly excited to replace the broken piece and seemed to have no interest in placing blame or putting me out with a million questions. They were way more interested in making sure I had a working product and that I was happy. Customer Service was great and I'm very happy with the product so far. Even if it leaks again, I have no doubt I'll be taken care of.

### ⭐⭐⭐⭐ Really fun and great for kids of all ages!
*by M***L on July 4, 2023*

My second grade students became interested in rock tumbling this year after another student brought in their collection. Soon they started collecting rocks on the playground. I knew I had to capitalize on their excitement, so I found this kid friendly rock tumbler. First things first, it is AMAZING. It comes with everything you need, including cool rocks ready to tumble, although you’ll probably need to restock the grinding powders if you’re going to do multiple sets like we have. A few things to note: It is hard to open and close. Have someone strong on hand to do it, because I struggle to do it myself. It is LOUD. I mean, it’s rocks tumbling in a jar. Of course it’s loud. But find someplace to set it up near a plug because it’s going to be distracting otherwise. In the classroom, we stuffed it in a cabinet - still made noise but muffled it enough that we could still focus. At home, we did it on the back porch. I’m sure the neighbors could hear it on quiet nights, but oh well. As long as you muffle it, it’ll sound like a white noise. Last but not least, this process takes a lot of TIME! About a month from start to finish. Be patient. The good news is that aside from opening it, filling it, and plugging it in, there’s minimal upkeep. You just leave it alone and let the tumbler do its job. Opening it every week was the highlight of our week. The process is so cool even after just the first cycle. It’s so worth the time it takes. Don’t drain it in your sinks. The gunk will mess up your pipes. After the last cycle, the rocks won’t be fully polished. We bought some mineral oil and polished them ourselves for a nice sheen. Worth the additional extra few bucks. After school let out, I brought it home to do it again with my toddlers. They loved it just as much as the big kids. I would recommend this to any future geologist in the making!

## Frequently Bought Together

- NATIONAL GEOGRAPHIC Starter Rock Tumbling Kit - Durable Leak-Proof Polisher for Kids Complete Geology Hobby Science Kit, Rocks and Crystals Kids, A Great STEM Activity
- 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
- 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

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-01-23*