--- product_id: 203519949 title: "NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1.36 kg of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit" brand: "blue marble" price: "¥35044" currency: JPY in_stock: false url: https://www.desertcart.jp/products/203519949-national-geographic-rock-tumbler-refill-kit-1-36-kg-rough store_origin: JP region: Japan --- # 9 unique gemstone varieties 4 jewelry fastenings included 4-step grit polishing system NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1.36 kg of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit **Brand:** blue marble **Price:** ¥35044 **Availability:** ❌ Out of Stock ## Summary > 💎 Turn Rough into Remarkable – Your Gemstone Journey Starts Here! ## Quick Answers - **What is this?** NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1.36 kg of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit by blue marble - **How much does it cost?** ¥35044 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/203519949-national-geographic-rock-tumbler-refill-kit-1-36-kg-rough) ## 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 - • **Create Custom Jewelry Like a Pro:** Includes necklace, earrings, keychain, and ring fastenings to showcase your polished masterpieces. - • **STEM Learning Meets Hands-On Fun:** Comes with an engaging guide packed with fascinating gemstone facts to fuel curiosity and creativity. - • **Transform Rough Rocks into Dazzling Gems:** Master the art of tumbling with 1.36 kg of diverse raw gemstones including Amethyst and Quartz. - • **Trusted Quality from National Geographic:** Backed by a 4.6-star rating and satisfaction guarantee—perfect for aspiring geologists and makers alike. - • **Precision Polishing with Four Grit Grades:** Coarse to polish—achieve museum-quality shine with every step of the tumbling process. ## Overview The NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit offers 1.36 kg of nine distinct rough gemstones, including Amethyst and Quartz, paired with a four-stage grit system to polish stones to perfection. Designed for ages 8+, it includes jewelry fastenings and an educational guide, blending STEM learning with creative craftsmanship. No batteries required, this kit is a top-rated, hands-on experience for gemstone enthusiasts and DIY jewelry creators. ## Description NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1.36 kg of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit : desertcart.co.uk: Toys & Games ## Features - GEMSTONES OF NINE VARIETIES: Tiger’s Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Hematite (1.36 kg total) - FOUR GRADES OF GRIT: Coarse, Medium, Fine, Polish. Transform your stones from rough rocks to dazzling gemstones! - JEWELLERY FASTENINGS: 1 Necklace, 1 set of Earrings, 1 Keychain, 1 Ring. Create custom jewellery from your newly polished gemstones! - LEARNING GUIDE: Our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts - SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07H7WFWYT | | Age Range Description | 8 years and up | | Best Sellers Rank | 201,219 in Toys & Games ( See Top 100 in Toys & Games ) 1,793 in Educational Science Kits | | Brand Name | Blue Marble | | Colour | Red | | Customer Reviews | 4.6 4.6 out of 5 stars (1,634) | | Educational Objective | STEM | | Global Trade Identification Number | 00816448025914 | | Is Assembly Required | No | | Item Dimensions | 13.6 x 13.5 x 13.8 centimetres | | Item Weight | 1.36 Kilograms | | Manufacturer | JMW Sales, Inc. | | Manufacturer Part Number | NGGEMREFILLMEGA | | Manufacturer recommended age | 8 years and up | | Material Type | Gemstones | | Model Number | NGGEMREFILLMEGA | | Operation Mode | Manual | | Size | 3 pounds | | Sub Brand | National Geographic | | Subject Character | Gemstones | | Supported Battery Types | No batteries required | | Theme | Nature | | UPC | 816448025914 | | Unit Count | 1.0 count | ## Product Details - **Brand:** Blue Marble - **Age range (description):** 8 years and up - **Colour:** Red - **Theme:** Nature - **Cartoon character:** Gemstones ## Images ![NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1.36 kg of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit - Image 1](https://m.media-amazon.com/images/I/A1+omj2TEGL.jpg) ## Questions & Answers **Q: Can you make seaglass with it?** A: Yes, you can make sea glass in our tumbler. Please keep in mind you won't want to use anything less than 1/4" thick, as it will just crumble and not tumble. **Q: Does it come with a rock tumbler machine** A: No, our Mega Refill kit does not include a rock tumbler. Our tumbler is sold separately. ## Frequently Bought Together - National Geographic Rock Tumbler Refill Kit – 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit and Jewelry Accessories - 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 - 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 --- ## 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.jp/products/203519949-national-geographic-rock-tumbler-refill-kit-1-36-kg-rough](https://www.desertcart.jp/products/203519949-national-geographic-rock-tumbler-refill-kit-1-36-kg-rough) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-19*