{"product_id":"iceland-spar-60","title":"Iceland Spar $60.00","description":"\u003cp data-start=\"173\" data-end=\"576\"\u003eIceland Spar is a clear variety of calcite known for its remarkable optical property called double refraction, where light passing through the crystal appears doubled. This natural mineral has been studied for centuries and is known for its role in helping demonstrate how light behaves. Each piece is unique, making it a fascinating addition to any geology collection or hands-on science exploration.\u003c\/p\u003e\n\u003cp data-start=\"578\" data-end=\"600\"\u003eWhy You’ll Love This\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"603\" data-end=\"672\"\u003eNatural calcite crystal that clearly demonstrates double refraction\u003c\/li\u003e\n\u003cli data-start=\"675\" data-end=\"742\"\u003eEach specimen is unique in shape, clarity, and internal structure\u003c\/li\u003e\n\u003cli data-start=\"745\" data-end=\"822\"\u003eExcellent for hands-on learning about light, optics, and mineral properties\u003c\/li\u003e\n\u003cli data-start=\"825\" data-end=\"898\"\u003eSmooth surfaces highlight the crystal’s transparency and visual effects\u003c\/li\u003e\n\u003cli data-start=\"901\" data-end=\"964\"\u003eIdeal for classrooms, collectors, or science-focused displays\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"966\" data-end=\"1064\"\u003eHandle with care, as calcite is a softer mineral and can scratch more easily than harder stones. Each specimen is approximately 3.5-4 x 3-3.5 x 1.5-2 inches. Natural clarity and patterns will vary.\u003c\/p\u003e\n\u003cp data-start=\"1066\" data-end=\"1144\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eExplore the science of light and optics through this striking natural crystal.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Howard","offers":[{"title":"Default Title","offer_id":42085868470465,"sku":"R6000","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0074\/0638\/7247\/files\/NewStoreSite-BackgroundRemover_44_4ad7a615-d576-43d4-94c7-98eddf3bcc50.png?v=1777053936","url":"https:\/\/store.smm.org\/products\/iceland-spar-60","provider":"The Science Museum of Minnesota","version":"1.0","type":"link"}