{"product_id":"kyanite-tumbled-6-00","title":"Kyanite Tumbled $6.00","description":"\u003cp data-start=\"68\" data-end=\"478\"\u003eKyanite is an aluminosilicate mineral (Al₂SiO₅) known for its distinctive bladed crystal form and strong directional hardness. Typically found in metamorphic rocks, kyanite forms under high-pressure conditions deep within the Earth’s crust. These tumbled specimens have been smoothed and polished while retaining the mineral’s characteristic shimmer and layered appearance.\u003c\/p\u003e\n\u003cp data-start=\"480\" data-end=\"489\"\u003eFeatures:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"493\" data-end=\"565\"\u003eComposition: Aluminum silicate (Al₂SiO₅), part of the sillimanite group.\u003c\/li\u003e\n\u003cli data-start=\"493\" data-end=\"565\"\u003eAppearance: Blue to blue-gray with a pearly to vitreous luster and visible layering or fibrous structure.\u003c\/li\u003e\n\u003cli data-start=\"493\" data-end=\"565\"\u003eFormation: Grows in high-pressure, low-temperature metamorphic environments, often in schists and gneisses.\u003c\/li\u003e\n\u003cli data-start=\"493\" data-end=\"565\"\u003ePhysical Properties: Mohs hardness varies by direction—about 4.5 parallel to the crystal axis and up to 7 across it—making it unique among minerals.\u003c\/li\u003e\n\u003cli data-start=\"493\" data-end=\"565\"\u003eEducational Value: Demonstrates anisotropic hardness, metamorphic mineral formation, and the crystal chemistry of aluminosilicates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1074\" data-end=\"1225\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eTumbled kyanites offer both visual appeal and a tangible example of how pressure and structure influence mineral properties in Earth’s dynamic systems.\u003c\/p\u003e","brand":"The Science Museum of Minnesota","offers":[{"title":"Default Title","offer_id":67599753904425,"sku":"R600","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1321\/7603\/files\/blue-kyanite-tumble-stone-large_T_2_I_1281_D_14182_G_15612_V_1.jpg?v=1791574493","url":"https:\/\/www.theurbancharm.com\/products\/kyanite-tumbled-6-00","provider":"The Urban Charm ","version":"1.0","type":"link"}