--- product_id: 542553468 title: "Ultra Quiet Rock Tumbler Kit for Adults โ€“ 3LB Professional Rock Polisher with Noise-Reduction Cover & Brushless Motor, 3 Speeds, 9-Day Timer & Complete Accessories for Hobbyists & Collectors" brand: "komestone" price: "$403.12" currency: USD in_stock: true reviews_count: 13 url: https://www.desertcart.us/products/542553468-ultra-quiet-rock-tumbler-kit-for-adults-3lb-professional-rock store_origin: US region: United States of America --- # Ultra-quiet operation 9-day programmable timer Brushless motor, 20,000+ hrs lifespan Ultra Quiet Rock Tumbler Kit for Adults โ€“ 3LB Professional Rock Polisher with Noise-Reduction Cover & Brushless Motor, 3 Speeds, 9-Day Timer & Complete Accessories for Hobbyists & Collectors **Brand:** komestone **Price:** $403.12 **Availability:** โœ… In Stock ## Summary > ๐Ÿ’Ž Transform Rough Rocks into Stunning Gemsโ€”Silently, Smoothly, Professionally! ## Quick Answers - **What is this?** Ultra Quiet Rock Tumbler Kit for Adults โ€“ 3LB Professional Rock Polisher with Noise-Reduction Cover & Brushless Motor, 3 Speeds, 9-Day Timer & Complete Accessories for Hobbyists & Collectors by komestone - **How much does it cost?** $403.12 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/542553468-ultra-quiet-rock-tumbler-kit-for-adults-3lb-professional-rock) ## Best For - komestone enthusiasts ## Why This Product - Trusted komestone brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - โ€ข **Massive 3LB Capacity:** Polish larger batches of rocks at once, accelerating your creative projects without constant refills. - โ€ข **Whisper-Quiet Tumbling:** Noise-reduction cover and soft rubber barrel absorb impact for near-silent polishingโ€”perfect for shared or indoor spaces. - โ€ข **Next-Gen Brushless Motor:** Cutting-edge motor delivers over 20,000 hours of maintenance-free, smooth performance with a lifespan beyond 10 years. - โ€ข **Pro-Level 4-Stage Polishing:** Achieve museum-quality shine with precision ceramic media and a leak-proof stainless steel lid for mess-free tumbling. - โ€ข **Lifetime Support & Accessories:** Backed by 90-day satisfaction guarantee, 1-year warranty, and lifetime replacement parts plus expert US-based customer service. ## Overview The KomeStone Ultra Quiet Rock Tumbler Kit is a professional-grade 3LB capacity rock polisher featuring a cutting-edge brushless motor with over 20,000 hours lifespan and a noise-reduction cover for ultra-quiet operation. It offers a 9-day programmable timer and a 4-stage grit polishing system to deliver museum-quality shine. Designed for hobbyists and collectors, it includes all necessary accessories, a full-color instruction guide, and lifetime customer support with hassle-free replacement parts, making it the ultimate investment in creative rock tumbling. ## Description This is the brand flagship store owned by KomeStone, as the Original manufacture and brand outlet, KomeStone brand owns the design of all itโ€™s rock tumbler models. KomeStone provides the top-of-line manufacturer advanced professional Rock Tumbler Kits, featuring with all functions and accessories you need to master rocks tumbling and polishing. KomeStone K2 Elite noise-reduction & cutting-edge brushless motor rock tumbler is the first and only rock tumbler that built in with the cutting-edge brushless motor, providing this advanced rock tumbler with more than 20,000 hours work and service life and the lifespan beyond 10 years. We understand that rock tumbling is more than a hobbyโ€”it's an investment. Thatโ€™s why we stand behind every tumbler we sell with lifelong support: including replacement parts and technical guidance. Even after your w.arranty expires, we wonโ€™t disappear. You can count on us to keep your machine running smoothly for years to come. Your trust means everything to us. Weโ€™re hereโ€”not just to sell, but to support. Always. Each stone hides a story waiting to be revealed. The moment when rough rocks turn smooth and begin to shine is pure magic โ€” a reward for your patience, curiosity, and creativity. Watching your collection come to life is not just satisfying โ€” itโ€™s inspiring. Rock tumbling isnโ€™t just about polishing stones โ€” itโ€™s about the process of discovery. Many families tell us it has become a shared hobby that helps children build focus, patience, and an appreciation for hands-on learning. Every polished gem becomes a reminder that beautiful things take time and care. To keep your adventure going, explore our refill grit sets โ€” available in 4 lb, 6 lb (with ceramic media), and 10 lb (with ceramic & plastic pellets) โ€” perfect for larger projects or long-term tumbling. And for that final, glassy brilliance, try our 8000 / 12000 grit aluminum oxide polish in your next batch. Notice: If there is any part missing, please kind take a moment to reach out for a replacment or the compensation. Thanks for your patience! Welcome to a world of exquisite craftsmanship! Share your captivating stone creations with us, and we'll proudly showcase them across our desertcart details page and vibrant social media platforms. Your talent deserves a spotlight. Should any concerns arise, rest assured, we're dedicated to swift solutions. Instead of frustration, kindly connect with us for assistance. YOU MAY NOT KNOW: Rock tumblers transform raw rocks into stunning gems for jewelry, crafting, and collections. For an exceptional shine, explore the art of polishing with high-quality grits, soap water, mineral oil, and meticulous steps. Practice perfects the process. Dig Deeper: Absolutely. Inside your package, discover a full-color Instruction book, guiding you through every step. It's so clear, even a 4-year-old can navigate it. Ease your mind. Normally the belts for this rock tumler will not break, if it breaks, please reach out for replacement. First, consult our FAQs in the instruction book or on this page. For product concerns, connect with us directly. Our dedication to unparalleled service ensures swift resolutions. We recommend placing a towel at the bottom during the operation of the rock tumbler to enhance its grip and maintain maximum stability. The barrel can accommodate up to 3 lbs of rocks. This kit provides 1 lb rocks, and you have the option to include additional rocks of your choice while ensuring they do not exceed the 3 lbs capacity. Your satisfaction is paramount. Trust that we're dedicated to elevating your experience and swiftly addressing every matter. ## Features - ๐Ÿ—๐ŸŽ-๐ƒ๐š๐ฒ ๐’๐š๐ญ๐ข๐ฌ๐Ÿ๐š๐œ๐ญ๐ข๐จ๐ง ๐†๐ฎ๐š๐ซ๐š๐ง๐ญ๐ž๐ž & ๐Ÿ-๐˜๐ž๐š๐ซ ๐–๐š๐ซ๐ซ๐š๐ง๐ญ๐ฒ: Enjoy peace of mind with our extended 90-day refund guarantee and 1-year warranty. If you miss desertcart's 30-day return window, simply contact our ๐”๐’-๐›๐š๐ฌ๐ž๐ ๐œ๐ฎ๐ฌ๐ญ๐จ๐ฆ๐ž๐ซ ๐ฌ๐ž๐ซ๐ฏ๐ข๐œ๐ž team for ๐ก๐š๐ฌ๐ฌ๐ฅ๐ž-๐Ÿ๐ซ๐ž๐ž ๐ซ๐ž๐ฉ๐ฅ๐š๐œ๐ž๐ฆ๐ž๐ง๐ญ ๐จ๐ซ ๐ซ๐ž๐Ÿ๐ฎ๐ง๐ ๐š๐ฌ๐ฌ๐ข๐ฌ๐ญ๐š๐ง๐œ๐ž. We offer ๐Ÿ๐Ÿ’/๐Ÿ• ๐œ๐ฅ๐š๐ข๐ฆ ๐ฌ๐ฎ๐ฉ๐ฉ๐จ๐ซ๐ญ to ensure your complete satisfaction. - DIVE INTO THE FUN ROCK TUMBLING: KomeStone rock tumbler is for turning rough raw rocks into smooth gemstones. Youโ€™ll be excited to see the rocks change with each cycleโ€”a great lesson in patience for kids or inspiration for jewelry-making moms. - 2025 NEW UPGRADE & ADVANCED FEATURES: This K2 Elite rock tumbler stands out as the sole option to feature a cutting-edge brushless motor and noise-reduction function among high-end models. This makes it an ideal choice for users sensitive to noise and those who prefer tumbling indoors, even in smaller or shared spaces. Additionally, you'll appreciate the benefits of receiving original manufacturer and brand-direct troubleshooting support, as well as lifetime accessory replacement services. - 3 LBS EXTRA LARGE CAPACITY & ULTRA QUIETER: Our rock tumbler features 100% soft rubber barrels that effectively absorb the impact of tumbling rocks, resulting in an ultra-quiet operation comparable to a working dishwasher. The generously-sized 3 lbs barrel allows you to polish a larger quantity of rocks in each batch. - COMES WITH EVERYTHING YOU NEED FOR ROCKS TUMBING: Including the tumbler machine, 3 lbs barrel, 1 lb rough rocks, 1 extra belt (2 in total, one is on the wheel), 4 polishing grits and other accessories. Notably, it also includes a full-color instruction book that provides detailed and easy-to-follow guidance. Even an 8-year-old child can independently learn how to use it with clarity. - SCIENCE-BACKED POLISHING FOR PRO-LEVEL RESULTS: Achieve museum-quality shine with our 4-stage grit system (60/120/150/1200) and precision ceramic media. The leak-proof stainless steel lid ensures mess-free tumbling, while our exclusive guide unlocks pro techniques.If you need to replace or lubricate the belt, pleasedownload our latest manual for detailed illustratedinstructions. You can also reach out to us obtain themost up-to-date operating guide. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0C58TH7W6 | | Best Sellers Rank | #40,112 in Toys & Games (See Top 100 in Toys & Games) #14 in Kids' Rock Tumblers | | Brand Name | KomeStone | | Color | Black | | Customer Reviews | 4.5 4.5 out of 5 stars (843) 4.5 out of 5 stars | | Included Components | 1 extra belt for spare use and 4 polishing grits, 1 lb rough stones, illustrated tutorial learning guide, 1 x sifter, 1 x screwdriver, 1 set jewelry Fastenings, 1 x tumbler machine, 1 x 3 lb barrel, 1.5m AC adapter, Warranty Card ( Lifetime customert service email: support@komestone.com ) | | Item Type Name | Rock Tumbler | | Item Weight | 3.9 Kilograms | | Manufacturer | KomeStone | | Manufacturer Part Number | CA-KS0515RT46 | | Material Type | Cutting-Edge brushless motor, Please email to our after-sales service center ( support@komestone.com ) to receive the extra bag of rocks for spare use after placing the order. Our customer service will solve any issues timely., Stainless Steel, Tyre grade rubber, ๐‚๐๐’๐ˆ๐€ & ๐‚๐๐‚ ๐‚๐ž๐ซ๐ญ๐ข๐Ÿ๐ข๐ž๐ | | Model Number | CA-KS0515RT46 | | Power Source | Corded Electric | | Unit Count | 1.0 Count | ## Product Details - **Brand:** KomeStone - **Included Components:** (function(f) {var _np=(window.P._namespace("DetailPageProductOverviewTemplatesJava"));if(_np.guardFatal){_np.guardFatal(f)(_np);}else{f(_np);}}(function(P) { P.when('A').execute(function(A){ A.on('a:truncate:po-attribute-truncate-1:updated', function(data) { var isTruncated = !data.truncateInstance.getIfTextFits(); var seeMoreElement = document.getElementById('po-attribute-see-more-id-1'); if(seeMoreElement) { seeMoreElement.style.display = isTruncated ? '' : 'none'; } }) }); })); 1 x tumbler machine, 3 lb barrel, 1.5m AC adapter, rough stones, illustrated tutorial learning guide, extra belt for spare use and 4 polishing grits, sifter, screwdriver, set jewelry Fastenings1 x tumbler machine, 3 lb barrel, 1โ€ฆ See more - **Material:** (function(f) {var _np=(window.P._namespace("DetailPageProductOverviewTemplatesJava"));if(_np.guardFatal){_np.guardFatal(f)(_np);}else{f(_np);}}(function(P) { P.when('A').execute(function(A){ A.on('a:truncate:po-attribute-truncate-2:updated', function(data) { var isTruncated = !data.truncateInstance.getIfTextFits(); var seeMoreElement = document.getElementById('po-attribute-see-more-id-2'); if(seeMoreElement) { seeMoreElement.style.display = isTruncated ? '' : 'none'; } }) }); })); Stainless Steel, Cutting-Edge brushless motor, Tyre grade rubber, Please email to our after-sales service center ( support@komestone.com ) to receive the extra bag of rocks for spare use after placing the order. Our customer service will solve any issues timely., ๐‚๐๐’๐ˆ๐€ & ๐‚๐๐‚ ๐‚๐ž๐ซ๐ญ๐ข๐Ÿ๐ข๐ž๐Stainless Steel, Cutting-Edโ€ฆ See more - **Color:** A: K2 Elite (Brushless Motor & Noise Reduction) - **Power Source:** Corded Electric ## Images ![Ultra Quiet Rock Tumbler Kit for Adults โ€“ 3LB Professional Rock Polisher with Noise-Reduction Cover & Brushless Motor, 3 Speeds, 9-Day Timer & Complete Accessories for Hobbyists & Collectors - Image 1](https://m.media-amazon.com/images/I/81ZU5JdBXnL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: How can I order more polishing grits?** A: We have a polishing grits kit of 4 lbs, just visit the link: https://www.amazon.com/dp/B0B74KYP44. For any questions and concerns, please contact our customer service via: support@komestone.com, we'll get back to you very soon. For any issues about this rock tumbler, we promise to solve timely. We are standing behind our brand and products. Thanks for purchasing from us. **Q: How much polishing grits should I use?** A: For better results, we would advise you to add 2 tbsp or more of polishing grits per pound of rocks, and 0.5 lb-1 lb of the ceramic pellets for protect rocks from scratches. **Q: What is the rotation speeds per minute?** A: Normally speaking, the speeds is quite steady. Speed 1๏ผš770 Speed 2๏ผš920 Speed 3๏ผš1080 **Q: Can I add more than 3 lbs rocks into this barrel for tumbling?** A: The capacity of the barrel for the K2 Elite rock tumbler is 3 lbs, so you can add as much as 3 lbs of rocks, and then add water, and polishing grits and ceramic pellets. For any questions and concerns, please contact our customer service via: support@komestone.com, we'll get back to you very soon. For any issues about this rock tumbler, we promise to solve timely. We are standing behind our brand and products. Thanks for purchasing from us. Anne. ## Customer Reviews ### โญโญโญโญโญ Great for everyone beginner to pro *by on Reviewed in the United States March 7, 2026* This is great for beginners and avid rock hunters . My wife and I just started rock hunting last year. You can turn your finds into beautiful art. We are very impressed on the sturdiness and ease of use.Assembly was easy, It comes with easy follow instructions just take your time if you are a beginner. It comes with a nice assortment of rocks and plenty of product to get started, the controls are simple and instructions are clear even for a beginner, appears to be well made. It is very quiet for what it does . Nice size for the different stages of tumbling rocks.We have found that doing multiple batches in the different stages then combining them as the rocks reduce in size that way you are not wasting polishing grit. Rock Tumbler well packed for shipping and reasonably priced. ### โญโญโญโญโญ Cool little rock tumbler *by on Reviewed in the United States February 13, 2026* Iโ€™ve been running the K2 Elite nonstop for over a month, and itโ€™s been rock solid. It works exactly as advertisedโ€”no issues, no stopping, just consistent performance.The biggest standout is how quiet it is. The rubber barrel and enclosed housing make a huge difference compared to other tumblers Iโ€™ve used. Itโ€™s more of a low hum than that loud rattling noise.It came with extra belts, but I havenโ€™t needed any yet, which says a lot about durability. Build quality feels solid, and the 3 lb capacity is perfect for decent-sized batches.Customer service has also been excellentโ€”they respond quickly and are actually helpful. They also send a free bag of rocks on top of the bag that came with it, you just have to email them.Bottom line: Quiet, reliable, and well-built. Definitely one of the better tumblers Iโ€™ve owned. ### โญโญโญโญโญ Great tumbler *by on Reviewed in the United States December 26, 2025* I love this tumbler. I haven't had any issues with it since it was bought and I have been running it nonstop. I like that the belt is in a compartment to itself so it doesn't spin lubricant everywhere. You should keep your belt lubricated with a 3in1 oil or clipper oil so they don't dry and break. It's a little quieter than the ones that are out in the open. But it still going to be somewhat loud, it is tumbling rocks. It's durable and seems to be holding up. The barrel has a good thickness to it isn't showing any signs of wear and tear yet. I do like that it has a 3lb storage capacity. It holds a lot more rocks than the other small rock tumblers. It does come with some starter rocks and if you reach out to them after purchasing they will send some free rocks as well. I do believe it is a good value for everything that came with the machine. I think this tumbler is a good addition for any person that is interested in rock tumbling. ## Frequently Bought Together - KomeStone K2 Elite Professional Rock Tumbler Kit, Ultra Quiet & Cutting Edge Brushless Motor Rock Polisher for Adults & Rock Collector, Noise-Reduction, Extra Large 3 Lbs Barrel, STEM Gift for All Age - Polly Plastics Rock Tumbler Grit and Polish Refill & Ceramic Tumbling Filler Media - Silicone Carbide Polisher Grit - Rock Polish Supplies & Accessories - KomeStone Nylon Belt 2-Pack for K2 Elite Rock Tumbler โ€“ Durable Replacement Belt K2 Elite Model Only / 2 Pcs --- ## Why Shop on Desertcart? - ๐Ÿ›’ **Trusted by 1.3+ Million Shoppers** โ€” Serving international shoppers since 2016 - ๐ŸŒ **Shop Globally** โ€” Access 737+ million products across 21 categories - ๐Ÿ’ฐ **No Hidden Fees** โ€” All customs, duties, and taxes included in the price - ๐Ÿ”„ **15-Day Free Returns** โ€” Hassle-free returns (30 days for PRO members) - ๐Ÿ”’ **Secure Payments** โ€” Trusted payment options with buyer protection - โญ **TrustPilot Rated 4.5/5** โ€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/542553468-ultra-quiet-rock-tumbler-kit-for-adults-3lb-professional-rock](https://www.desertcart.us/products/542553468-ultra-quiet-rock-tumbler-kit-for-adults-3lb-professional-rock) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-08*