--- product_id: 74202849 title: "National Geographic Hobby Rock Tumbler Bundle for Kids and Adults | Noise-Reduced Barrel, 2.5 Lbs. Rough Gemstonesr, 4-Stage Grit, GemFoam Polish, Rock Polisher, Geology Hobby" brand: "blue marble" price: "$317.21" currency: USD in_stock: true category: "Blue Marble" url: https://www.desertcart.us/products/74202849-national-geographic-hobby-rock-tumbler-bundle-for-kids-and-adults store_origin: US region: United States of America --- # 2.5 lbs raw gemstone & jasper mix 75% quieter noise-reduced barrel Durable motor built to last National Geographic Hobby Rock Tumbler Bundle for Kids and Adults | Noise-Reduced Barrel, 2.5 Lbs. Rough Gemstonesr, 4-Stage Grit, GemFoam Polish, Rock Polisher, Geology Hobby **Brand:** blue marble **Price:** $317.21 **Availability:** ✅ In Stock ## Summary > 💎 Polish your passion, rock your world! ## Quick Answers - **What is this?** National Geographic Hobby Rock Tumbler Bundle for Kids and Adults | Noise-Reduced Barrel, 2.5 Lbs. Rough Gemstonesr, 4-Stage Grit, GemFoam Polish, Rock Polisher, Geology Hobby by blue marble - **How much does it cost?** $317.21 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/74202849-national-geographic-hobby-rock-tumbler-bundle-for-kids-and-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 - • **STEM-Approved Fun:** Engage curious minds with an award-winning kit designed to inspire learning and creativity in kids and adults alike. - • **Set & Forget Magic:** One-touch timer and automatic shutoff let you focus on life while your stones transform into treasures. - • **Sparkle Your World:** Transform rough stones into dazzling gemstones with ease and style. - • **All-Inclusive Gem Lab:** Comes complete with 4 polishing grits, sifter, learning guide, and 2 pounds of raw gems—everything you need to start polishing immediately. - • **Whisper-Quiet Creativity:** Enjoy peaceful polishing with a noise-reduced, leakproof rubber barrel that’s 75% quieter than competitors. ## Overview The National Geographic Hobby Rock Tumbler Kit is a durable, noise-reduced rock polisher designed for ages 8 and up. Featuring a powerful motor, leakproof rubber barrel that cuts noise by 75%, and 2.5 pounds of raw gemstones and jasper, this STEM-focused kit includes all necessary grits, tools, and guides to turn ordinary rocks into sparkling gems. Award-winning and easy to use, it’s perfect for educational fun and creative exploration. ## Description Buy National Geographic Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit: Rock Tumblers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - CREATE YOUR OWN GEMSTONES - Make any stone sparkle and polish everyday rocks into dazzling gemstones! This rock tumbler kit makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design. - BUILT TO LAST - Our high-quality tumblers are made with a durable motor that’s designed to last for years. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. Makes an excellent STEM gift or activity for girls and boys! - EVERYTHING INCLUDED - Tumbler, 4 polishing grits, sifter, Learning Guide, rough gemstones, PLUS 2 one-pound refill packs of rough gems and jasper stones. - EASY TO USE - Simple instructions and one-touch settings make rock tumbling fun and easy. Control the number of days for each tumbling cycle with the one-touch timer and automatic shutoff feature, so you can set it and forget it. This is a great gift for kids! - 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 | B07G9MWHGJ | | Age Range Description | 8 years and up | | Battery Description | Alkaline | | Best Sellers Rank | #1,618 in Toys & Games ( See Top 100 in Toys & Games ) #1 in Kids' Rock Tumblers | | Brand Name | Blue Marble | | Customer Reviews | 4.5 4.5 out of 5 stars (2,319) | | Educational Objective | STEM | | Global Trade Identification Number | 00816448025891 | | Included Components | Rock Tumbler, 2 Packs Gemstones | | Is Assembly Required | No | | Item Dimensions | 17.52 x 6.5 x 8.66 inches | | Item Type Name | Hobby Rock Tumbling Kit - Rock Polisher for Kids & Adults, | | Item Weight | 8 Pounds | | Manufacturer | JMW Sales, Inc. | | Manufacturer Maximum Age (MONTHS) | 1188 | | Manufacturer Minimum Age (MONTHS) | 96 | | Manufacturer Part Number | NGHOBBYBUN | | Material Type | Plastic,Rubber | | Model Number | NGHOBBYBUN | | Set Name | Hobby Rock Tumbler Kit | | Size | One Size | | Sub Brand | National Geographic | | Theme | Rock Tumbling | | UPC | 816448025891 | | Unit Count | 1.0 Count | ## Images ![National Geographic Hobby Rock Tumbler Bundle for Kids and Adults | Noise-Reduced Barrel, 2.5 Lbs. Rough Gemstonesr, 4-Stage Grit, GemFoam Polish, Rock Polisher, Geology Hobby - Image 1](https://m.media-amazon.com/images/I/81eRSHVQ+aL.jpg) ## Available Options This product comes in different **Style** options. ## Frequently Bought Together - National Geographic Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit - NATIONAL GEOGRAPHIC Break Open 10 Premium Geodes – Includes Goggles and 2 Display Stands - Great STEM Science Kit, Geology Gift for Kids, Break Your Own Geodes with Crystals, Toys for Boys and Girls - My Book of Rocks and Minerals: Things to Find, Collect, and Treasure --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/74202849-national-geographic-hobby-rock-tumbler-bundle-for-kids-and-adults](https://www.desertcart.us/products/74202849-national-geographic-hobby-rock-tumbler-bundle-for-kids-and-adults) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-13*