--- product_id: 37710951 title: "NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies" brand: "blue marble" price: "1869484₫" currency: VND in_stock: true reviews_count: 13 category: "Blue Marble" url: https://www.desertcart.vn/products/37710951-national-geographic-rock-tumbler-grit-and-polish-refill-kit-tumbling store_origin: VN region: Vietnam --- # Polishes up to 20 lbs. rocks Universal tumbler compatibility 4-stage precision grit system NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies **Brand:** blue marble **Price:** 1869484₫ **Availability:** ✅ In Stock ## Summary > ✨ Transform your stones, transform your space! ✨ ## Quick Answers - **What is this?** NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies by blue marble - **How much does it cost?** 1869484₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/37710951-national-geographic-rock-tumbler-grit-and-polish-refill-kit-tumbling) ## 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 - • **Bulk Polish Power:** Refill kit handles up to 20 lbs. of rocks, gems, and glass—because your collection deserves the best. - • **Award-Winning Quality:** From the makers of Toy of the Year, trusted for sparking creativity and precision craftsmanship. - • **Quad-Phase Perfection:** Four distinct grit stages sculpt, smooth, pre-polish, and shine your stones to museum-quality brilliance. - • **Plug & Play Compatibility:** Seamlessly works with any rock tumbler, making upgrades and refills effortless. - • **Secure & Organized Storage:** Wide-mouth, screw-top containers keep your grit fresh and ready for your next creative session. ## Overview The NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit offers a high-quality, four-stage silicon carbide grit system designed to polish up to 20 lbs. of rocks, gems, and glass. Compatible with all rock tumblers, it comes in secure, easy-to-use containers and is produced by an award-winning brand known for educational and creative excellence. ## Description desertcart.com: NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies : Industrial & Scientific Review: ROCK ON! - Let me spill the gems on a rock-solid addition to my lapidary adventures – the NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit. As a self-proclaimed rock enthusiast, this kit has truly rocked my world, giving my gemstones the shine they deserve. What's crystal clear about this refill kit is its top-notch quality. Packed with premium grit and polish, it's like giving your rocks a spa day. Whether I'm polishing up some quartz or tumbling some jasper, this kit ensures that my gemstones shine bright like a diamond. Using the NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit is a gem of an experience. Its easy-to-follow instructions make it a breeze to use, and the results speak for themselves – my stones come out looking so polished, they could rival any jewel in the crown jewels. Since I started using this refill kit, my rock tumbling game has gone from pebble to precious stone. Whether I'm crafting jewelry or just adding some sparkle to my collection, the NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit is my go-to for achieving that rockstar shine. In summary, if you're a rock enthusiast looking to add some sparkle to your collection, the NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit is a gem of a find. With its top-quality materials and stunning results, it's sure to rock your world. Review: Great product - Easy to read instructions. I used this on my raw garnets! ## Features - HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass, and more! - EASY TO USE, FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish! - COMPATIBLE WITH ALL TUMBLERS - This complete 4-step rock tumbler grit refill kit works with all rock tumblers. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies. - EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure. - 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 | B01MRKI4W0 | | Age Range Description | 14 years and up | | Best Sellers Rank | #1,504 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 (18,612) | | Educational Objective | STEM | | Global Trade Identification Number | 00816448020636 | | Included Components | 4 Stages of Rock Polishing Grit, 10 mL Grit Scoop, Rock Tumbling Instructions | | Is Assembly Required | No | | Item Dimensions | 5.5 x 5.5 x 4.25 inches | | Item Type Name | Rock Polishing Grit Media | | Item Weight | 1.78 Kilograms | | Manufacturer | JMW Sales, Inc. | | Manufacturer Maximum Age (MONTHS) | 1188 | | Manufacturer Minimum Age (MONTHS) | 168 | | Manufacturer Part Number | NGBULKGRIT | | Manufacturer Warranty Description | We're proud to make the highest quality products which are backed by exceptional service. | | Material Type | Silicone | | Model Number | NGBULKGRIT | | Number of Players | 1 | | Operation Mode | Manual | | Set Name | Rock Tumbler Grit Refill Kit | | Size | One Size | | Sub Brand | NATIONAL GEOGRAPHIC | | Supported Battery Types | No batteries required | | Theme | Rock Tumbling | | UPC | 816448020636 | | Unit Count | 1.0 Count | ## Images ![NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies - Image 1](https://m.media-amazon.com/images/I/91eEtrXZOeL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: How many oz is in each container?** A: 1 Coarse-16oz. 2 Medium-13oz. 3 Pre-polish-12oz. 4 Polish-11.5 oz. **Q: I just opened this and finished with grit one, went to put grit 2 in and bottle open and 1/2 full. How do I contact seller?** A: I would go through Amazon to get an answer for your problem. **Q: Can it be used together ?** A: Each grit is a different fineness intended for a specific purpose. We do not recommend using them at the same time. We do recommend 1 TBS grit per per 1 LB rocks, at each cycle. For further information please contact us at help@natgeotoys.com. **Q: After each step for the rocks in the kit, my rocks dry with a dull white finish. It doesn't show when it is wet. Am I doing something wrong?** A: No. I find that after tumbling with the finest grit after the last step... and thoroughly allowing the rocks to dry, a nice coat of wax or oil brings out the color beautifully. ## Customer Reviews ### ⭐⭐⭐⭐⭐ ROCK ON! *by B***F on March 1, 2024* Let me spill the gems on a rock-solid addition to my lapidary adventures – the NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit. As a self-proclaimed rock enthusiast, this kit has truly rocked my world, giving my gemstones the shine they deserve. What's crystal clear about this refill kit is its top-notch quality. Packed with premium grit and polish, it's like giving your rocks a spa day. Whether I'm polishing up some quartz or tumbling some jasper, this kit ensures that my gemstones shine bright like a diamond. Using the NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit is a gem of an experience. Its easy-to-follow instructions make it a breeze to use, and the results speak for themselves – my stones come out looking so polished, they could rival any jewel in the crown jewels. Since I started using this refill kit, my rock tumbling game has gone from pebble to precious stone. Whether I'm crafting jewelry or just adding some sparkle to my collection, the NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit is my go-to for achieving that rockstar shine. In summary, if you're a rock enthusiast looking to add some sparkle to your collection, the NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit is a gem of a find. With its top-quality materials and stunning results, it's sure to rock your world. ### ⭐⭐⭐⭐⭐ Great product *by B***T on April 21, 2026* Easy to read instructions. I used this on my raw garnets! ### ⭐⭐⭐⭐⭐ Good grit *by W***R on March 28, 2026* This grit works really well on obsidian. It came nicely packaged, and was a good price. ## Frequently Bought Together - 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 Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults - UU UNIHOM 3 lbs Bulk Rough Madagascar Stones Mix Large 1" Natural Raw Stones Crystal for Tumbling, Cabbing, Fountain Rocks, Decoration,Polishing, Wire Wrapping, Wicca Reiki Crystal Healing --- ## 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.vn/products/37710951-national-geographic-rock-tumbler-grit-and-polish-refill-kit-tumbling](https://www.desertcart.vn/products/37710951-national-geographic-rock-tumbler-grit-and-polish-refill-kit-tumbling) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-09*