{"product_id":"blue-marble-national-geographic-hobby-rock-tumbler-kit-durable-leak-proof-polisher-with-7-day-timer","title":"Blue Marble National Geographic Hobby Rock Tumbler Kit — Durable, Leak-Proof Polisher with 7-Day Timer","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eDiscover a hands-on, educational hobby that blends science, craft, and curiosity. The Blue Marble National Geographic Hobby Rock Tumbler Kit lets you transform rough stones into glossy, gem-like keepsakes. Built for durability, the kit features a sturdy motor with time and speed controls, a leak-proof barrel, and a stainless-steel lid that stays securely in place during long polishing sessions. The result is a smooth, quiet operation that invites repeated experiments and repeated discovery without fuss.\u003c\/p\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1\/2 pound of rough rocks with nine gemstone types\u003c\/li\u003e\n\u003cli\u003eFive jewelry fastenings for quick kit-to-create projects\u003c\/li\u003e\n\u003cli\u003eTumbler grit to drive the polishing process\u003c\/li\u003e\n\u003cli\u003eStrainer for simple rinsing and cleanup\u003c\/li\u003e\n\u003cli\u003eGemFoam polishing foam for a bright final shine\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003eLoad the stones with grit, set the timer, and run the tumbler at your chosen speed. After each tumbling stage, rinse the rocks and repeat. In the final stage, add GemFoam and water to the barrel to unlock a vivid, smooth shine on your stones.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRough rocks become colorful, textured, and smooth to the touch over multiple sessions\u003c\/li\u003e\n\u003cli\u003eThe leak-proof barrel and stainless-steel lid help keep your workspace tidy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy this kit stands out\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAll-in-one setup designed for curiosity-driven learning and creative play\u003c\/li\u003e\n\u003cli\u003eBlue Marble’s award-winning approach with U.S. support for a confident experience\u003c\/li\u003e\n\u003cli\u003eGeology, color, and craftsmanship combine in a hands-on STEM activity suitable for kids and adults alike\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhether you’re a budding geologist, a hobby crafter, or a curious family exploring new textures and colors, this kit offers a tangible path from rough stones to polished gems. Keep expectations flexible and enjoy the small, tangible rewards of each polishing session.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What’s included in the Blue Marble National Geographic Hobby Rock Tumbler Kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Includes 1\/2 lb of rough rocks with nine gemstone types, five jewelry fastenings, tumbler grit, strainer, and GemFoam polish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this kit suitable for beginners and kids?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The durable motor, time and speed controls, and all-in-one components help first-timers start safely and progress at their own pace.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Marble","offers":[{"title":"Default Title","offer_id":46533728600263,"sku":"B086Z6ZB7R","price":90.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/2355\/7319\/files\/blue-marble-national-geographic-rock-tumbler-front-view.jpg?v=1778572398","url":"https:\/\/toyterrax.com\/products\/blue-marble-national-geographic-hobby-rock-tumbler-kit-durable-leak-proof-polisher-with-7-day-timer","provider":"ToyTerrax","version":"1.0","type":"link"}