{"product_id":"selenite-3-00","title":"Selenite $3.00","description":"\u003cp data-start=\"59\" data-end=\"413\"\u003eTumbled selenite specimens are smooth, polished pieces of a transparent to translucent variety of gypsum, with the chemical formula CaSO₄·2H₂O (calcium sulfate dihydrate). These pieces retain the mineral’s fibrous structure and pearly luster, making them excellent examples of naturally formed evaporite minerals.\u003c\/p\u003e\n\u003cp data-start=\"415\" data-end=\"428\"\u003eFeatures:\u003c\/p\u003e\n\u003cul data-start=\"430\" data-end=\"1215\"\u003e\n\u003cli data-start=\"430\" data-end=\"597\"\u003e\n\u003cp data-start=\"432\" data-end=\"597\"\u003eComposition: Made of calcium sulfate with two water molecules per unit, selenite forms through the evaporation of mineral-rich water in sedimentary environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"599\" data-end=\"758\"\u003e\n\u003cp data-start=\"601\" data-end=\"758\"\u003eAppearance: Typically colorless to white, with a silky or pearly sheen. The fibrous internal structure can produce a soft glow or chatoyancy under light.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"760\" data-end=\"913\"\u003e\n\u003cp data-start=\"762\" data-end=\"913\"\u003eFormation: Occurs in clay beds, salt flats, and other evaporite settings where water slowly evaporates, leaving behind concentrated mineral layers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"915\" data-end=\"1074\"\u003e\n\u003cp data-start=\"917\" data-end=\"1074\"\u003ePhysical Properties: Soft (Mohs hardness of 2), easily scratched, and sensitive to water. These specimens should be kept dry to maintain their integrity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1076\" data-end=\"1215\"\u003e\n\u003cp data-start=\"1078\" data-end=\"1215\"\u003eEducational Value: Ideal for teaching mineral softness, crystal structure, and the geologic processes that form sedimentary minerals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1217\" data-end=\"1368\"\u003eTumbled selenite pieces are excellent for classroom use, geology collections, or anyone interested in the natural processes that shape Earth’s surface.\u003c\/p\u003e","brand":"The Science Museum of Minnesota","offers":[{"title":"Default Title","offer_id":47750013386966,"sku":"R300","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/2491\/1830\/files\/SeleniteTumbled.webp?v=1769021894","url":"https:\/\/threecrows.com.co\/de\/products\/selenite-3-00","provider":"ThreeCrowsLLP","version":"1.0","type":"link"}