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Blue Marble

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

    • Based on 4,110 reviews
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

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Availability: Only 5 left in stock, order soon!
Fulfilled by Amazon
Arrives Sunday, Nov 24
Order within 6 hours and 31 minutes
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Edition: Professional


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!
  • HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!

Product Dimensions: 16.06 x 10.83 x 5.51 inches


Item Weight: 6.35 pounds


Country of Origin: China


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: Sunday, Nov 24

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.

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Similar Products

Top Amazon Reviews

    • Great! just be careful of overloading!!
Edition: Pro 3 with GemFoam
I fully love this tumbler and its usefulness, i’ve had it for about a year now and the only issues i’ve had; was the motor shorting out, due to overloading the tub too much. Customer service was amazing helping with the issue, user error is an easy mistake to avoid! Otherwise it’s a very easy tumbler to use! ... show more
Reviewed in the United States on November 3, 2024 by cheryl ashley
    • Quiet, Easy to Use and Fun Little Rock Tumbler Kit!
Edition: Pro 3 with GemFoam
Review Image by Lena Boyce Lena Boyce
Review Image by Lena Boyce Lena Boyce
Review Image by Lena Boyce Lena Boyce
The media could not be loaded. 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! ... show more
Reviewed in the United States on November 9, 2023 by Lena Boyce Lena Boyce
    • 7th birthday gift, works great! Need to buy more grit, USE GEM FOAM AT END!
Edition: Pro 3 with GemFoam
Review Image by Marby Marby
The process takes a while but is very rewarding! We found these rocks on a beach in Michigan. They were all pretty smooth already so we skipped to grit #2, then #3 then #4. After the #4 grit they were smooth but when they dried they still looked a little matte- not glossy shiny. We did 2 days with the gem foam blocks and water and WOW- they are so glossy and shiny! It’s loud-ish, but we put it in the basement and don’t notice or mind it. Holding up great after many uses, definitely buy more of the grit from Nat Geo, it comes in bottles. ... show more
Reviewed in the United States on July 16, 2024 by Marby Marby
    • Decent tumbler so long as you don't follow directions
Edition: Pro 3 with GemFoam
This tumbler does fine for what it is. The main thing is to not follow any of the directions or use any of the included objects. Just use the tumbler and ignore everything else. Also don't go to any higher speed than 1. Yes, the directions say use speed 3. Don't. Speed 1 is already too fast. Don't go faster. Why should you not use the included items? Well. 1) This is a 3 pound tumbler. There's only 1 pound of rocks included. To get a good tumble you need to at least fill it 2/3rds full (i.e. you would need AT LEAST double the amount of rocks, if not triple -- the rocks will lose volume as they go, meaning you'll have less and less rocks to take up space as time goes on). Not only that, the mix of stones is not of similar hardness. If one were to dump the included amount in, not only would it not fill the tumbler enough to get an effective tumble, but the harder stones would absolutely obliterate the softer ones. Also to note: most of the included stones were not really of a good enough size or quality to tumble, even if they were of similar hardness. Many were tiny chips or shards. Some were so badly cut that they wouldn't polish up well at all. Not great candidates for making it all the way to the end. 2) The included grit is both not enough and also not really useable due to having no indication as to what you're using or how coarse each step actually is. Even if you WERE provided that information, to get an effective tumble, you would need a great deal more than what is provided. It would be very difficult to achieve your desired results with so little product. Visually, all stages seem to be silicon carbide. This will not effectively polish your stones in the final steps, no matter how hard you try, even if you DID have enough. Additionally, the included gemfoam seems to do nothing to improve the situation. Just go ahead and get a set of tumbling grit from The Rock Shed or Polly Plastics and include some ceramic pellets for cushioning. Follow their directions instead. 3) The included booklet is really only good for IDing the rocks that were included in the one pound bag. Other than that, the directions and suggestions are garbage and the little blurbs beside the gems have a bit more woo than I personally am happy with (lots of "people believe this stone has (x healing property) etc"). Meh to that. End takeaway: The speeds they suggest are inappropriately high, plus, as stated above, the included objects are inappropriately proportioned and mixed. Get yourself a decent amount of stones from elsewhere, augment with the proper grit, keep the speed on 1, and follow literally any other directions, and you'll be golden. It's a decent tumbler in and of itself. It's also comparatively quiet, for a tumbler. This is probably due to the rubber barrel. Good purchase all in all. ... show more
Reviewed in the United States on December 26, 2021 by Marlene R. Curtin
    • Perfect for a beginner that wants to learn with their kids
Edition: Professional
Perfect for every beginner polished rock enthusiast!
Reviewed in the United States on November 13, 2024 by Ryan Stephens

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