{"product_id":"tourmaline-in-quartz-3-00","title":"Tourmaline in Quartz $3.00","description":"\u003cp data-start=\"147\" data-end=\"523\"\u003eThese specimens feature black tourmaline (schorl) embedded within clear or milky quartz (SiO₂), combining two common rock-forming minerals in a single polished stone. The striking contrast of dark, needle-like tourmaline inclusions within a lighter quartz matrix makes it a visually distinct and geologically informative sample.\u003c\/p\u003e\n\u003cp data-start=\"525\" data-end=\"534\"\u003eFeatures:\u003c\/p\u003e\n\u003cul data-start=\"536\" data-end=\"1367\"\u003e\n\u003cli data-start=\"536\" data-end=\"787\"\u003e\n\u003cp data-start=\"538\" data-end=\"787\"\u003eComposition: The quartz is composed of silicon dioxide, while the tourmaline is a complex borosilicate mineral rich in iron, giving it a black appearance. Both minerals are durable and commonly found together in metamorphic and igneous environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"789\" data-end=\"1000\"\u003e\n\u003cp data-start=\"791\" data-end=\"1000\"\u003eAppearance: Tourmaline appears as black rods or streaks—often radiating or intersecting—within translucent or opaque quartz. The tumbled finish highlights this natural contrast and enhances surface smoothness.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1002\" data-end=\"1201\"\u003e\n\u003cp data-start=\"1004\" data-end=\"1201\"\u003eFormation: Forms in high-temperature environments such as granite pegmatites or regional metamorphic rocks, where tourmaline crystals grow within silica-rich fluids that later solidify into quartz.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1203\" data-end=\"1367\"\u003e\n\u003cp data-start=\"1205\" data-end=\"1367\"\u003eEducational Value: Excellent for illustrating mineral inclusion, crystallization processes, and the coexistence of multiple minerals in a single geologic setting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1369\" data-end=\"1524\"\u003eThese polished pieces are well suited for teaching, collecting, or display, showing how complex mineral growth can occur in natural rock-forming environments.\u003c\/p\u003e","brand":"The Science Museum of Minnesota","offers":[{"title":"Default Title","offer_id":47750014468310,"sku":"R300","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/2491\/1830\/files\/Tourmaline-Quartz-Inclusions-Tumble-_-Roulee-2-scaled.jpg?v=1769021894","url":"https:\/\/threecrows.com.co\/products\/tourmaline-in-quartz-3-00","provider":"ThreeCrowsLLP","version":"1.0","type":"link"}