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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Availability:
Only 5 left in stock, order soon!
Arrives
Thursday, Jul 30
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Style: Pro Kit with 9-Day Timer
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!
Brand Name: Blue Marble
Age Range Description: 8 years and up
Educational Objective: STEM
Sub Brand: National Geographic
Set Name: National Geographic Professional Rock Tumbling Kit
UPC: 810070622374
Manufacturer Minimum Age (MONTHS): 96
Global Trade Identification Number: 74
Model Number: NGPROTUM5
Manufacturer Part Number: NGPROTUM5
Manufacturer: JMW Sales, Inc.
Item Type Name: Professional Heavy Duty Rock Tumbler Kit
Unit Count: 1.0 Count
Included Components: Complete Rock Tumbler Kit, 2lb Capacity, 4-Stage Grit, 1lb Rough Gemstones, Jewelry Fastenings, GemFoam
Theme: Geology
Is Assembly Required: No
Size: One Size
Item Dimensions: 16.06 x 10.83 x 5.51 inches
Item Weight: 6.35 Pounds
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jul 30
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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Similar Products
Top Amazon Reviews
Style: Pro Kit with GemFoam
I just got this rock tumbler kit today, and so far I am very pleased with it! It is quiet, and doesn't take up too much space, and it comes with rocks to tumble, a jewelry-making kit, an extra pully band, foam and grit, and a nice booklet on the rocks included with the tumbler. A very nice little kit from Nat Geo, for a good price! It definitely does not come with enough grit though. I purchased additional 120 grit aluminum oxide to use with for my future rock tumbling. I might get a different grade of grit later, but to start out 120 aluminum oxide seemed most likely to give my rocks the best shine, without grinding them into dust. I can also say that the wheel looks a bit wiggly, but it doesn't seem to hinder the machine at all. I am trying an experiment right now where I soak my rocks for 24 hours prior to tumbling them, and then I am going to add just a bit of mineral oil to the water, grit and foam. I am testing my rocks in; vinegar, mineral oil and water/ mineral oil and water/ water. I will update this review of the results, after I have results to post. UPDATE: DO NOT USE DARK COLORED/BLACK GRIT/SAND/POWDER WITH LIGHT COLORED STONES! It grinds into the stones, and changes their color, based on the grit/powered/sand you're using! After 3 days of tumbling to each batch of stones, these are my results: - The vinegar, mineral oil and water mix: Shined and cleaned the rocks, and seemed to soften them, creating a visible effect in their polish. - The mineral oil and water: Also shined the stones, and seemed to soften them, without much difference in their cleanliness, and added a visible effect in their polish. - Water: Did not soften or clean the stones, and had less of an effect on their polish. OVERALL RESULTS OF EXPERIMENT: I think pre-soaking the stones in mineral oil and vinegar had the most noticeable effect on the stones polish. They seem to soften in the mineral oil, and the vinegar does get them clean pre-polish. I also tried tumbling the stones in mineral oil and water, with the aluminum oxide powder, and found that the dark colored powder ground into the stones, specifically the Tigers Eye. ...Which is NOT the result I wanted. Upon further experimentation and research, I have decided to use clean/white sand and colored sand as grit, to see if those work better as a polishing medium than the aluminum oxide. If my theory is correct, pre-soaking the stones in mineral oil and vinegar and then tumbling with the color sands should grind the sand color of my choice into the rocks. Will update later with pictures, if/when possible. So far, it's a going well and I'm having fun experimenting with geology! Yay, shiny rocks! Thanks Nat Geo!
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Reviewed in the United States on November 9, 2023 Reviewed in the United States on November 9, 2023 by Lena Boyce
Style: Pro Kit with 9-Day Timer
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 Reviewed in the United States on August 10, 2023 by MSmom
Style: Pro Kit with GemFoam
I bought this for myself 4 years ago when I was in my 50s. I knew nothing about rock tumbling. This has been a great little tumbler. Since then I've purchased a larger tumbler and a vibratory tumbler. That said I still use this tumbler! If you join an online rock tumbling group some people might be a little snobbish about this tumbler, but I can't say enough good things about it. I haven't used it 24/7, but it's gotten a good workout over the years. I'm careful to clean the barrel after every use and between stages. My fingers maybe aren't the strongest anymore so I use a screwdriver to pop the metal lid from the barrel and have no problem removing the top. I'm going to attach pictures of the first batch I tumbled. For stage 1 I tumble the rocks without any added filler/media (ceramic). I also bought ceramic filler and used that for stages 2-4. I like using the included foam pieces for stage 4 and I'm really pleased with the nice shine they provide. Yes, it's a little noisy so I put it in a room that doesn't get much use. I bought a plastic washing machine drain pan to place this in just in case I would have leaks, but that hasn't been an issue.
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Reviewed in the United States on July 26, 2025 Reviewed in the United States on July 26, 2025 by Tori Bradley
Style: Pro Kit with GemFoam
*UPDATED* Painless return and replace process -the replace my unit was at my door before the review went live. Sealed and with all parts. Thank you! I like this tumbler. It’s effective and easy to use. Personally, I wish it had the ability to pause. Sometimes I want to look mid-cycle and don’t want to leave on or loose my day count. I also wish the machine turned totally off, without needing to unplug. But I’m still playing at round and will reread the paperwork. Would buy again, for myself or for loved ones. ———- This arrived unsealed, open and missing parts of the kit. I’ll be reaching out and will update my review to accurately reflect my experience thru the process.
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Reviewed in the United States on June 8, 2023 by Spender of Money
Style: Pro Kit with 9-Day Timer
Bought this for my wife as birthday gift. This is no joke or exaggeration........ This polisher has been running continuously for 2 years. Yeah. 2 years. The only time she shuts it off is to add or remove rocks and grit. It hasn't given her any issues and has worked well for her
Reviewed in the United States on April 26, 2026 by Bubba Fipps
Style: Pro Kit with GemFoam
My grandson loves this!
Reviewed in the United States on May 23, 2026 by Amazon Customer
Style: Pro Kit with 9-Day Timer
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
Style: Pro Kit with GemFoam
Nice rock tumbler! Not too much noise, fun and easy to use. Great value!
Reviewed in the United States on January 19, 2026 by Jessica