--- product_id: 222518474 title: "NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media" brand: "blue marble" price: "482.91 DT" currency: TND in_stock: true category: "Blue Marble" url: https://www.desertcart.tn/products/222518474-national-geographic-rock-tumbler-grit-and-media-refill-kit-rock store_origin: TN region: Tunisia --- # Patented GemFoam media for unmatched shine 1.5 lbs ceramic pellets reduce noise & breakage 4-stage silicon carbide grit for precision polish NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media **Brand:** blue marble **Price:** 482.91 DT **Availability:** ✅ In Stock ## Summary > ✨ Turn rough stones into polished gems—because your collection deserves the spotlight! ## Quick Answers - **What is this?** NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media by blue marble - **How much does it cost?** 482.91 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/222518474-national-geographic-rock-tumbler-grit-and-media-refill-kit-rock) ## 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 - • **Ceramic Media Magic:** Quiet your tumbler and protect your stones with 1.5 lbs of premium ceramic pellets. - • **GemFoam Shine Booster:** Add the patented GemFoam for a dazzling, showroom-worthy finish every time. - • **Award-Winning STEM Fun:** From the Toy of the Year creators, this kit sparks creativity and scientific curiosity. - • **Universal Compatibility:** Works seamlessly with any rock tumbler—upgrade your setup without hassle. - • **Precision 4-Stage Grit System:** Achieve museum-quality polish with industrial-grade silicon carbide grit. ## Overview The NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit includes a complete 4-stage silicon carbide grit system, 1.5 pounds of ceramic pellets to reduce noise and rock damage, and patented GemFoam polishing media for superior shine. Designed for use with any rock tumbler, this award-winning kit delivers professional-grade results while fostering STEM learning and creativity. ## Description desertcart.com: NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media : Industrial & Scientific ## Features - QUALITY RESULTS AND DAZZLING POLISH - The rock polishing grit in this pack is high-quality silicon carbide and will polish 8-10 lbs of rocks. Includes measuring scoop and storage containers with secure screw-top closures for easy storage. - IMPROVE YOUR ROCK TUMBLING RESULTS – Ceramic tumbler media makes the entire rock tumbling process more effective, improving delivery of rock tumbling grit, quieting tumbler noise, reducing rock breakage, and acting as a filler for smaller batches. - PATENTED WAY TO MAKE TUMBLED ROCKS SHINE – GemFoam is a unique, patented rock polisher media that gives unprecedented shine to tumbled rocks. Just add GemFoam to your tumbler after the final grit cycle for great results! - WORKS WITH ANY ROCK TUMBLER – The tumbling supplies in this set are safe to use with any rock tumbler. The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results. - desertcart EXCLUSIVE - Blue Marble has developed this product exclusively for desertcart. - 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 | B08B7GRBK6 | | Age Range Description | 8 years and up | | Best Sellers Rank | #2,158 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Tumbling Media | | Brand Name | Blue Marble | | Color | Black | | Customer Reviews | 4.7 4.7 out of 5 stars (2,211) | | Educational Objective | STEM | | Global Trade Identification Number | 00816448027512 | | Included Components | 1.5 Pounds of Ceramic Media, 10 mL Scoop, 30 g GemFoam, 4 Stages of Silicon Carbide Polishing Grit Compound | | Indoor Outdoor Usage | Indoor | | Item Dimensions | 7.48 x 5.32 x 5.47 inches | | Item Type Name | Ultimate Rock Polishing Supplies Kit | | Manufacturer | JMW Sales, Inc. | | Manufacturer Part Number | NGFOMCERGRIT | | Manufacturer recommended age | 8 years and up | | Material Type | Resin, Foam | | Model Number | NGFOMCERGRIT | | Number of Packs | 1 | | Number of Players | 1 | | Operation Mode | Manual | | Power Source | AC adapter | | Set Name | Ultimate Rock Polishing Supplies Kit | | Size | Medium | | Sub Brand | National Geographic | | Subject Character | Quarter | | Theme | Science | | UPC | 816448027512 | | Unit Count | 1 Count | ## Images ![NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media - Image 1](https://m.media-amazon.com/images/I/91oyBF1mZaL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Can Gemfoam be purchased separately?** A: Yes, we do sell the Polishing Foam separately. **Q: What is the difference between this and product # ngbulkgrit?** A: Thank you so much for your inquiry. This item (the Complete Media Kit) contains the grit along with GemFoam to assist in the polishing stage and Ceramic Pellets to reduce rock breakage along with making the tumbling process more quiet. The Bulk Grit does not contain the GemFoam or pellets, but does contain the grit. **Q: How much of each medium is included in this accessories set?** A: The jars shown hold approximately 2/3 of a cup, so plan on buying bulk bags in the near future. **Q: My lid cracked and i need a new one. Are there replacement parts avaliable to buy?** A: Not sure if you are referring to the tumbler canister lid but you will find replacement parts on Ebay under rock tumbler parts ## Frequently Bought Together - Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media - National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults - 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? - 🛒 **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.tn/products/222518474-national-geographic-rock-tumbler-grit-and-media-refill-kit-rock](https://www.desertcart.tn/products/222518474-national-geographic-rock-tumbler-grit-and-media-refill-kit-rock) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-25*