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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This item is eligible for return within 30 days of receipt
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Availability:
Only 5 left in stock, order soon!
Arrives
Tuesday, Sep 23
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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. Its 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!
Product Dimensions: 16.06 x 10.83 x 5.51 inches
Item Weight: 6.35 pounds
Item model number: NGPROTUM5
Manufacturer recommended age: 8 years and up
Release date: February 26, 2024
Manufacturer: JMW Sales, Inc.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Sep 23
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
My kids and husband love this and have been tumbling rocks for weeks. It works great. Just a warning, you have to keep it on for weeks. It’s in our garage but I thought it would be a few hours not weeks lol. Great for beginners.
Reviewed in the United States on July 28, 2025 by Jemma
I like it. Works well. Nice capacity, not too loud.
Reviewed in the United States on July 25, 2025 by James M Horst
Why did you pick this product vs others?: Oh what a great and fun gift for a child. Purchased this tumbler for my grandson who loved rocks, and it was a hit. The price for value definitely worth it. It is a quality tumbler for first time lapidary interest. Of course it's a bit noisy when it's tumbling and full of rocks. My grandson had and still is having a lot of fun seeing his dirty rocks turning into shiny stones.
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Reviewed in the United States on June 20, 2025 by Gnomegirl60 Gnomegirl60
This is my first rock tumbler ever so please take that into consideration. I had it in my "saved for later" until I saw it on sale. It took me a while to do this review because I wanted a successful batch first. It's small which is perfect for my small (crafting/beading/jewelry making/lapidary) workspace. I live in a tiny one-bedroom studio apartment. I was expecting the noise to wake the neighbors; however, it is very quiet..I believe it's due to the rubber barrel. (I'm one that has ran dishwashers at night to help me sleep...so I actually like the constant sound.) No noise complaints so far..lol. After running the small batch of rocks that came with it...using the sample grits & polish that also were included, I read many reviews & did a lot of YouTube-ing as the rocks never got shiny. I found that National Geographic brand tumblers are good, but the grit/polish...not so much. On my second try, using silicon carbide grits & aluminum oxide polish, (I couldn't find any information about what kind the Nat Geo was) the stones & gems came out nice & shiny. So you may want to spend a little more to get better results. I do use the National Geographic brand ceramic media & have been pleased with it. I only run it on level 1 speed as, according to my research, most comparable models/brands have a slower rotation speed than this National Geographic one on level 1. The included instructions are clear & helpful & will tell you running times & speeds to use. If you purchase another brand of grit/polish, it may also come with instructions regarding running times & such. The settings on this tumbler are very simple & easy to use. I'm very happy with my National Geographic rock tumbler & would recommend it.
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Reviewed in the United States on August 10, 2023 by MSmom MSmom
I got this for my teenage great-nieces last Christmas. They are having a lot of fun with it. Their mom threatened to steal it from them because it looked like so much fun, so they let her use it too. The whole family is enjoying it.
Reviewed in the United States on July 19, 2025 by KathyM
I'll cut right to the chase, she quit one week in. Yes, one week in. Everything was in the box and nothing was damaged. I bought this as a gift and the recipient was very excited. We loaded the drum together, followed all the instructions. There were no missing parts or indication of problems. Yet after we had filled and run the first grit- just after starting the second round of polishing- the engine freaked out and the drum wouldn't turn. We did all sorts of troubleshooting and it turns out this is a KNOWN problem. This rock tumbler malfunctions all the time. I get that everything is becoming cheaper but I'd be embarassed to put the name National Geographic on a product that is consistently defective. This isn't the first time a name brand product I've gotten off of Amazon has been trash, and it likely won't be the last. I'd say it's a safe bet that this listing is a dumping ground for a troublesome product they want to make something back on. Save your time, and your money, and look for better rock tumblers elsewhere.
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Reviewed in the United States on June 6, 2024 by dion
I bought this unit back in August '23 but didn't try it out until February '24. It was very easy to set up and worked flawlessly through the first run (4 days) with the coarse grit. After that run, using the supplied rocks and grit, the rocks had lost their sharp edges - very pretty at that point in the process. Yes, the machine is noisy but it's tumbling rocks around in a rubber barrel. Much quieter than the tiny, metal paint can that came with the tumbler that I had when I was a kid. I followed the instructions to clean the contents, load up the 2nd grit and water and set the timer for 5 days. After the first day, the motor shut off and "Er" was displayed. I tried the steps suggested (unplug, replug; remove 1/2 the contents, etc) but no joy. I tried multiple iterations over 3 days. In desperation, I contacted customer service via email, with very low expectations. Well, to my shock, Candi answered me in less than an hour! After just a couple of emails, we decided that the unit was beyond help but Candi explained that there was a warranty and sent me several courses of action, any of which were perfectly fine. I'm looking forward to completing my project with my new tumbler when it arrives, thanks to amazing customer service!
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Reviewed in the United States on February 13, 2024 by JJ