--- product_id: 219854530 title: "National Geographic GemFoam Reusable Rock Polisher for Rock Tumblers" brand: "blue marble" price: "123.62 DT" currency: TND in_stock: true category: "Blue Marble" url: https://www.desertcart.tn/products/219854530-national-geographic-gemfoam-reusable-rock-polisher-for-rock-tumblers store_origin: TN region: Tunisia --- # 3-day polishing process Up to 6 reuse cycles Patent-pending polishing foam National Geographic GemFoam Reusable Rock Polisher for Rock Tumblers **Brand:** blue marble **Price:** 123.62 DT **Availability:** ✅ In Stock ## Summary > 💎 Polish Like a Pro, Shine Like a Star! ## Quick Answers - **What is this?** National Geographic GemFoam Reusable Rock Polisher for Rock Tumblers by blue marble - **How much does it cost?** 123.62 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/219854530-national-geographic-gemfoam-reusable-rock-polisher-for-rock-tumblers) ## 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 - • **Effortless Compatibility:** Works seamlessly with any durable rock tumbler, especially optimized for National Geographic tumblers. - • **Unmatched Shine, Every Time:** GemFoam delivers a brilliant polish that elevates your rocks to museum-quality gleam. - • **Eco-Friendly & Cost-Effective:** Reusable up to 6 cycles, saving you money and reducing waste in your creative projects. - • **Simple Final Step for Pro Results:** Just add GemFoam after your grit cycle and tumble for up to 3 days for a flawless finish. - • **Exclusive & Award-Winning Innovation:** Developed by Blue Marble, Toy of the Year winner, ensuring quality and STEM educational value. ## Overview The National Geographic GemFoam Reusable Rock Polisher is a patent-pending foam media designed to add exceptional shine to tumbled rocks. Reusable for up to 6 polishing cycles, it works with any durable rock tumbler and is especially effective when used after the final grit cycle. Developed by award-winning Blue Marble, this innovative product offers an eco-friendly, cost-efficient way to achieve professional-grade rock polishing results in just 3 days. ## Description desertcart.com: National Geographic GemFoam Reusable Rock Polisher for Rock Tumblers | Reusable Polishing Foam, Adds Shine After Grit Cycles, Rock Tumbling Media, Works with Tumbled Rocks and Minerals : Industrial & Scientific ## Features - A BRAND NEW WAY TO MAKE TUMBLED ROCKS SHINE – GemFoam is a unique new rock polishing media that gives unprecedented shine to tumbled rocks. Just add the patent-pending rock polishing media to your tumbler after the final grit cycle for great results! - A LITTLE GOES A LONG WAY – Add a pack of GemFoam to your rock tumbling arsenal and use for multiple tumbling projects. GemFoam is reusable for up to 6 rock polishing cycles and comes with a convenient reusable bag made of mesh for easy storage. - WORKS WITH ANY ROCK POLISHER - GemFoam is safe to use with any durable tumbler. For best results, use with our National Geographic line of tumblers and rock tumbling supplies, like our ceramic media, tumbling grit, and rock refill packs. - EASILY IMPROVE YOUR ROCK TUMBLING RESULTS - When your final rock tumbling grit cycle is complete, add GemFoam, water, and the rocks you'd like polished back to the tumbler and tumble up to 3 days. Rocks will will come out with polish and shine! - 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 | B08B7DJTCR | | Age Range Description | 8 years and up | | Best Sellers Rank | #1,996 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Tumbling Media | | Brand Name | Blue Marble | | Color | Black | | Customer Reviews | 4.4 4.4 out of 5 stars (716) | | Educational Objective | STEM | | Global Trade Identification Number | 00816448027451 | | Included Components | GemFoam Reusable Rock Polisher Foam | | Indoor Outdoor Usage | Indoor | | Item Dimensions | 4.72 x 1.18 x 7.28 inches | | Item Highlight | Reusable Polishing Foam, Adds Shine After Grit Cycles, Rock Tumbling Media, Works with Tumbled Rocks and Minerals | | Item Type Name | Rock Tumbling Media GemFoam Reusable Rock Polisher Foam | | Manufacturer | JMW Sales, Inc. | | Manufacturer Part Number | NGFOMBAG | | Manufacturer recommended age | 8 years and up | | Material Type | Foam | | Model Number | NGFOMBAG | | Number of Players | 1 | | Operation Mode | Manual | | Power Source | Manual | | Set Name | Single Set | | Size | One Size | | Sub Brand | National Geographic | | Supported Battery Types | No batteries required | | Theme | Rock Tumbling | | UPC | 816448027451 | | Unit Count | 1 Count | ## Images ![National Geographic GemFoam Reusable Rock Polisher for Rock Tumblers - Image 1](https://m.media-amazon.com/images/I/91Rp1wQXT4L.jpg) ## Available Options This product comes in different **Style** options. ## Frequently Bought Together - Blue Marble National Geographic Rock Tumbling Media – GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbling Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies - 2 LBS Rock Tumbling Ceramic Filler Medi Rock Tumbling Ceramic Filler Media Non- Abrasive Ceramic Pellets for All Type Tumblers 3/16" X 3/8" - 3LB Rock Tumbler Grit and Polish Refill Set, 4-Step Professional Polish Rock Tumbler Grit to Unlock Stunning Polished Stones. Ideal for National Geographic, KomeStone, and Other Polishers and Tumblers --- ## 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/219854530-national-geographic-gemfoam-reusable-rock-polisher-for-rock-tumblers](https://www.desertcart.tn/products/219854530-national-geographic-gemfoam-reusable-rock-polisher-for-rock-tumblers) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-01*