--- product_id: 265847435 title: "Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 5 lb. Mix of Rocks for Tumbling and Rough Gemstones - Rock Tumbler Supplies include Rock Tumbler Grit and Polish Refill, and Unpolished Rocks" brand: "blue marble" price: "Β₯28289" currency: JPY in_stock: true url: https://www.desertcart.jp/products/265847435-blue-marble-national-geographic-rock-tumbler-refill-kit-5-lb store_origin: JP region: Japan --- # 5 lb. rock mix detailed guide 20 grit packets Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 5 lb. Mix of Rocks for Tumbling and Rough Gemstones - Rock Tumbler Supplies include Rock Tumbler Grit and Polish Refill, and Unpolished Rocks **Brand:** blue marble **Price:** Β₯28289 **Availability:** βœ… In Stock ## Summary > 🌟 Rock Your World with Every Tumble! ## Quick Answers - **What is this?** Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 5 lb. Mix of Rocks for Tumbling and Rough Gemstones - Rock Tumbler Supplies include Rock Tumbler Grit and Polish Refill, and Unpolished Rocks by blue marble - **How much does it cost?** Β₯28289 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/265847435-blue-marble-national-geographic-rock-tumbler-refill-kit-5-lb) ## 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 - β€’ **Polish Like a Pro!:** Includes 20 grit packets for five complete tumbling cyclesβ€”your rocks will shine like never before! - β€’ **Quality You Can Trust!:** Backed by exceptional service, ensuring your rock tumbling experience is nothing short of stellar. - β€’ **Craft Your Own Jewelry!:** Transform polished stones into stunning keepsakes with 5 included jewelry settings. - β€’ **Learn While You Create!:** Comes with a detailed learning guide packed with polishing tips and fascinating stone facts. - β€’ **Unleash Your Inner Geologist!:** Dive into a 5 lb. treasure trove of unpolished rocks and gemstones, perfect for all ages. ## Overview The Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit offers a comprehensive 5 lb. mix of unpolished rocks and gemstones, complete with 20 grit packets for multiple polishing cycles. Ideal for ages 8 and up, this kit includes jewelry settings and a detailed learning guide, making it a perfect educational tool for budding geologists and creative minds alike. ## Description NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 5 lb. Mix of Rocks for Tumbling and Rough Gemstones - Rock Tumbler Supplies include Rock Tumbler Grit and Polish Refill, and Unpolished Rocks ## Features - ENORMOUS VARIETY - This rock tumbler refill kit has 5 pounds of unpolished rocks and gemstones consisting of a 1-pound gemstone mix, 1-pound agate mix, 1-pound Madagascar mix, 1-pound jasper mix, and 1-pound petrified wood mix - ROCK POLISHING GRIT – There are 20 total rock tumbler grit packets in the kit, enough for five complete tumbling cycles with any rock tumbler - JEWELRY SETTINGS – Once your rocks are polished, use the 5 included jewelry settings to create beautiful keepsakes or use the included storage pouch to keep your favorite specimens all in one place - DETAILED LEARNING GUIDE – The learning guide includes polishing instructions along with fascinating information about the stones in the kit - HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right! ## Technical Specifications | Specification | Value | |---------------|-------| | Product Dimensions | 17.53 x 15.49 x 14.99 cm; 2.95 kg | | Manufacturer recommended age | 8 years and up | | Item model number | NGWORLDREFILL | | Educational Objective(s) | Learning Education STEM Toys | | Language: | English | | Number of Game Players | 1 | | Assembly Required | No | | Batteries Required? | No | | Batteries Included? | No | | tech_spec_battery_description_toys | No batteries required | | Material Type(s) | Rocks, Gemstones, Agate,Jasper, Petrified Wood | | Remote Control Included? | No | | Color | Multicolor | | Language | English | | ASIN | B07XM95HZY | ## Images ![Blue Marble NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 5 lb. Mix of Rocks for Tumbling and Rough Gemstones - Rock Tumbler Supplies include Rock Tumbler Grit and Polish Refill, and Unpolished Rocks - Image 1](https://m.media-amazon.com/images/I/91sA8CejWrL.jpg) ## Questions & Answers **Q: hi we have lost the cord for this, is there one we can purchase?** A: They are great to deal with I would call them **Q: With my rock tumbler kit i received 15% off my next purchase of refill pack. The savings will not apply to the 5# refill, why?** A: I have tried using this coupon with several different refill packs only for Amazon to not accept it. There seems to be a disconnect between NatGeo and Amazon regarding their promotional coupon codes. **Q: How to identify tumbled rocks? i ruined the manual, its been years since college geology. any hints? seriously, all i can identify is tigers eye.** A: You can use the internet and now you can get a app from the app store for all rock's identification good luck : ) **Q: Are the stones ethically sourced?** A: As a science company we take great care in assuring that all our products are sourced ethically and appropriately. ## Frequently Bought Together - National Geographic Rock Tumbler Refill Kit - 5 lb. Mix of Rocks for Tumbling and Rough Gemstones - Rock Tumbler Supplies Include Rock Tumbler Grit and Polish Refill, and Unpolished Rocks - 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/265847435-blue-marble-national-geographic-rock-tumbler-refill-kit-5-lb](https://www.desertcart.jp/products/265847435-blue-marble-national-geographic-rock-tumbler-refill-kit-5-lb) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-26*