--- product_id: 119836791 title: "National Geographic Rock Tumbler Starter Kit (2016 Release)" brand: "blue marble" price: "¥39035" currency: JPY in_stock: true reviews_count: 1 url: https://www.desertcart.jp/products/119836791-national-geographic-rock-tumbler-starter-kit-2016-release store_origin: JP region: Japan --- # Transforms rocks into gemstones Reliable motor power Leak-proof, durable barrel National Geographic Rock Tumbler Starter Kit (2016 Release) **Brand:** blue marble **Price:** ¥39035 **Availability:** ✅ In Stock ## Summary > 💎 Sparkle your world—because ordinary rocks deserve extraordinary shine! ## Quick Answers - **What is this?** National Geographic Rock Tumbler Starter Kit (2016 Release) by blue marble - **How much does it cost?** ¥39035 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/119836791-national-geographic-rock-tumbler-starter-kit-2016-release) ## 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 - • **Built to Last:** Durable, leak-proof rubber-lined barrel ensures mess-free, long-lasting use. - • **Create & Flaunt:** Craft your own unique jewelry pieces with included necklace, ring, keychain, and earring fastenings. - • **Polish Like a Pro:** Turn everyday stones into dazzling gemstones with four precision polishing grits. - • **Effortless & Educational:** Plug-and-play design with an 8-page STEM guide to master rock tumbling. - • **All-Inclusive Starter Kit:** Everything you need—tumbler, grits, rough stones, jewelry settings, and a full-color guide. ## Overview The Blue Marble National Geographic Rock Tumbler Starter Kit (2016 Release) is a beginner-friendly, all-in-one rock polishing system designed for ages 8 and up. Featuring a reliable motor and a leak-proof, rubber-lined barrel, it includes ½ pound of rough stones, four polishing grits, jewelry fastenings, and an educational guide. Perfect for STEM enthusiasts and creative hobbyists, this kit transforms ordinary rocks into stunning gemstones and wearable art. ## Description Kick off an exciting new hobby with the Starter Rock Tumbler Kit from National Geographic! This kit has all the features and accessories you’ll need to transform rough rocks into extraordinary gemstones, start an awesome rock collection, and create beautiful jewelry. Contents and Features:- Reliable, long-lasting motor- Leak-proof, rubber-lined tumbler barrel- ½ pound of stones and four levels of grit- 5 Jewelry FasteningsThis high-quality beginner tumbler makes rock tumbling easy for kids and adults. Detailed instructions are easy to follow and will have you successfully tumbling in no time!The rough rocks provided (½ lb) contain nine different gemstones from around the world, and our tumbling grit is labeled by tumbling stage to make the process even easier! Choose your favorite gems and turn them into jewelry with the included necklace, key chain, ring, and two clip-on earring fastenings inside.This is a great way to inspire a love of a hobby that can last a lifetime! Plus, kids are astounded by the transformation they'll see once rocks are fully polished! It's also a fantastic STEM toy thanks to the detailed learning guide. There they'll learn how rocks are smoothed and polished over time in nature and discover fascinating facts about the gemstones in the kit!National Geographic Toys is proud to provide only the highest quality products, each backed by a complete satisfaction guarantee so that you can buy with confidence.About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations. Review: Doesn't close after first time. - Doesn't close after first time. Too much Waste of money. Rubber gets loose tooo. Thats enough review for the first time Review: It's ok - It's ok ## Features - MAKE ANY STONE SPARKLE and polish everyday rocks into dazzling gemstones - ENHANCE YOUR ROCK COLLECTION or start a new one! Makes all rocks shine like professionally polished stones - EVERYTHING IS INCLUDED in the kit - Tumbler, four polishing grits, a sifter, jewelry settings, a full-color 8 page learning guide and nine types of REAL rough gemstones - EASY TO USE for Rock Hounds of all ages and skill levels; plug it in and polishing begins ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01I56RV0C | | Age Range (Description) | 8 years and up | | Age Range Description | 8 years and up | | Best Sellers Rank | #135,390 in Toys & Games ( See Top 100 in Toys & Games ) #3,572 in Science Toys & Kits | | Brand | Blue Marble | | Brand Name | Blue Marble | | Colour | yellow | | Customer Reviews | 4.3 out of 5 stars 10,729 Reviews | | Global Trade Identification Number | 00816448020391 | | Included Components | 5 Jewelry Fastenings, Leak-proof, rubber-lined tumbler barrel, Rock Tumbler, ½ pound of stones and four levels of grit Included Components 5 Jewelry Fastenings, Leak-proof, rubber-lined tumbler barrel, Rock Tumbler, ½ pound of stones and four levels of grit See more | | Item Dimensions | 27.9 x 13.2 x 30.5 Centimeters | | Item Type | Beginner's Rock Tumbler | | Item Weight | 1.9 Kilograms | | Item dimensions L x W x H | 27.9 x 13.2 x 30.5 Centimeters | | Manufacturer | Discover with Dr. Cool | | Manufacturer Part Number | NGTUMBLER2 | | Material | Silicone | | Material Type | Silicone | | Model Name | Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - | | Model number | NGTUMBLER2 | | Number of Pieces | 30 | | Set Name | Starter Kit | | Size | 1 Count (Pack of 1) | | Special Features | Leak Proof | | Subject Character | Rock Tumbling & Gemstone Creation | | UPC | 816448020391 | | Unit Count | 1 Count | | Warranty Description | 30 day warranty against manufacturer defects | ## Product Details - **Age Range (Description):** 8 years and up - **Brand:** Blue Marble - **Item Weight:** 1.9 Kilograms - **Item dimensions L x W x H:** 27.9 x 13.2 x 30.5 Centimeters - **Size:** 1 Count (Pack of 1) ## Images ![National Geographic Rock Tumbler Starter Kit (2016 Release) - Image 1](https://m.media-amazon.com/images/I/91kh7806KEL.jpg) ## Questions & Answers **Q: Can this be used to tumble glass to make sea glass?** A: Yes! I have a spot where I find lots of shards of glass and rare colors but they just aren’t “cooked” enough. I got the tumbler to finish them. The glass I have is real sea glass not fake nor bottles I break (which I have never done and won’t because I like that I find my glass and know it has a story from whence it came!) I have found it along beaches and rivers but it just needed some extra time to be perfect but because of the color rarity I wasn’t going to toss it back! **Q: Where can I buy more grit?** A: Amazon (there are alternatives if you want to search for a specific one you need: coarse (60/90 grit), medium (150/220 grit), fine (500 grit), rock polish (TXP aluminum oxide) but below are two choices that will contain all you’d need, are approx the same lbs of material, and will work equally well): https://www.amazon.com/dp/B01MRKI4W0/ref=cm_sw_r_cp_api_i_8luBDbAX0440H https://www.amazon.com/dp/B07PYFGT44/ref=cm_sw_r_cp_api_i_SkuBDbZFZBTVW **Q: How many pounds/ounces of rocks can you put into the barrel with grit for tumbling?** A: The Rock Tumbler can hold 1lb (16oz) of rocks in the barrel with the grit for tumbling.Thank you for your inquiry! **Q: How long does it take from start to finish? And can you use any rocks or only the ones that come with it** A: Each grade of sand is a different grit. About 3 weeks and one extra week to polish. You can run any rocks even ones that you find. ## Customer Reviews ### ⭐ Doesn't close after first time. *by S***A on 31 March 2025* Doesn't close after first time. Too much Waste of money. Rubber gets loose tooo. Thats enough review for the first time ## Frequently Bought Together - NATIONAL GEOGRAPHIC Starter Rock Tumbling Kit - Durable Leak-Proof Polisher for Kids Complete Geology Hobby Science Kit, Rocks and Crystals Kids, A Great STEM Activity - 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 - 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/119836791-national-geographic-rock-tumbler-starter-kit-2016-release](https://www.desertcart.jp/products/119836791-national-geographic-rock-tumbler-starter-kit-2016-release) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-12*