--- product_id: 220905045 title: "NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Rock Polisher" brand: "blue marble" price: "187071CFA" currency: XOF in_stock: true reviews_count: 13 category: "Blue Marble" url: https://www.desertcart.sn/products/220905045-national-geographic-professional-rock-tumbler-kit-complete-rock-tumbler-adults store_origin: SN region: Senegal --- # Includes 1 lb. raw rocks + patented GemFoam polish Variable speed & timer control 2 lb. leak-proof stainless steel barrel NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Rock Polisher **Brand:** blue marble **Price:** 187071CFA **Availability:** βœ… In Stock ## Summary > πŸ’Ž Polish Your Passion, Rock Your World! ## Quick Answers - **What is this?** NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Rock Polisher by blue marble - **How much does it cost?** 187071CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/220905045-national-geographic-professional-rock-tumbler-kit-complete-rock-tumbler-adults) ## 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 - β€’ **All-Inclusive Kit:** Comes complete with 1 lb. of diverse raw gemstones, 4-stage grit, jewelry fastenings, and the exclusive GemFoam polish. - β€’ **Award-Winning STEM Fun:** Backed by the Toy Association’s Toy of the Year, this kit sparks creativity and scientific curiosity for all ages. - β€’ **Durable & Whisper-Quiet:** 75% quieter than plastic barrels with a robust motor built to last through countless tumbling sessions. - β€’ **Effortless Gemstone Creation:** Transform rough stones into dazzling gems with simple, set-and-forget operation. - β€’ **Revolutionary GemFoam Finish:** Achieve museum-quality shine with patented reusable foam polishβ€”your gems will outshine the rest. ## Overview The NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit is a premium, award-winning STEM hobby set designed for both adults and kids. Featuring a durable 2 lb. leak-proof stainless steel barrel with variable speed and timer controls, it offers a quiet, efficient tumbling experience. The kit includes 1 lb. of raw gemstones, 4-stage grit, jewelry fastenings, and the patented GemFoam polishing media for a brilliant finish. Perfect for creative minds eager to craft their own polished gems with professional results. ## Description Buy NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Rock Polisher: Tumbling Media - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: Quiet, Easy to Use and Fun Little Rock Tumbler Kit! - 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! Review: Kids love it. Revenge on Sister. - If you need a gift for your sister's kids, this one is almost as good as a drum set, and better than a thousand beads. Unfortunately, I suspect they used their sea monkeys for grit, but it's still doing the job. ## Features - CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This professional 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 has time and speed control settings so you can set it and forget it. An improved leak-proof, 2 lb. barrel features a stainless-steel lid and is 75% quieter overall than plastic tumbler barrels. - INCLUDES 1 LB. OF ROCKS & MORE - This tumbling kit comes with everything you need: 1 lb. of raw rocks with 9 types of gemstones, 5 jewelry fastenings, grit, strainer & GemFoam for a dazzling shine! - USE GEMFOAM FOR DAZZLING RESULTS - This rock tumbler kit stands apart from others thanks to our new, reusable 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! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B086Z83SV5 | | Age Range Description | Kid, Adult | | Best Sellers Rank | #32,373 in Toys & Games ( See Top 100 in Toys & Games ) #14 in Kids' Rock Tumblers | | Brand Name | Blue Marble | | Customer Reviews | 4.5 out of 5 stars 4,452 Reviews | | Educational Objective | STEM | | Included Components | 1 Lb. Rough Gemstones, 4 Stage Tumbling Grit, GemFoam Patented Polishing Media, Jewelry Fastenings, Professional Tumbler | | Item Dimensions | 12.6 x 6.69 x 10.24 inches | | Item Type Name | Professional Rock Tumbler Kit | | Language | English | | Manufacturer | JMW Sales, Inc. | | Manufacturer Part Number | NGPROTUMBLER3 | | Manufacturer recommended age | 8 years and up | | Material Type | Plastic | | Model Number | NGPROTUMBLER3 | | Number of Items | 1 | | Number of Packs | 1 | | Set Name | Gemstone Set | | Size | One Size | | Sub Brand | National Geographic | | Theme | Earth Science | | UPC | 816448029288 | | Unit Count | 1 Count | ## Images ![NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Rock Polisher - Image 1](https://m.media-amazon.com/images/I/91NIcMq15dL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quiet, Easy to Use and Fun Little Rock Tumbler Kit! *by L***E on November 9, 2023* 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! ### ⭐⭐⭐⭐⭐ Kids love it. Revenge on Sister. *by M***E on July 15, 2026* If you need a gift for your sister's kids, this one is almost as good as a drum set, and better than a thousand beads. Unfortunately, I suspect they used their sea monkeys for grit, but it's still doing the job. ### ⭐⭐⭐⭐⭐ Great Little Tumbler *by T***Y on July 26, 2025* 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. ## Frequently Bought Together - NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Rock Polisher - 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/220905045-national-geographic-professional-rock-tumbler-kit-complete-rock-tumbler-adults](https://www.desertcart.sn/products/220905045-national-geographic-professional-rock-tumbler-kit-complete-rock-tumbler-adults) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-09-27*