{"product_id":"orange-iceland-spar-60-00","title":"Orange Iceland Spar $60.00","description":"\u003cp data-start=\"0\" data-end=\"464\"\u003eIceland Spar, also known as Optical Calcite, is a striking variety of calcite valued for its polarizing effect on light, a property called birefringence. Historically, it is believed Vikings may have used this mineral to aid navigation on cloudy days. These specimens feature natural clarity and patterns, with unique variations in color and tone. The warm orange hue in these pieces is likely caused by trace amounts of manganese, adding to their visual appeal.\u003c\/p\u003e\n\u003cp data-start=\"466\" data-end=\"991\"\u003eWhy You’ll Love This\u003cbr data-start=\"486\" data-end=\"489\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDemonstrates birefringence, splitting light into two separate rays for hands-on optical exploration\u003c\/li\u003e\n\u003cli\u003eFeatures natural variations in clarity, color, and pattern, making each specimen unique\u003c\/li\u003e\n\u003cli\u003eOrange tones highlight trace mineral inclusions, showcasing the diversity of calcite formation\u003c\/li\u003e\n\u003cli\u003eGenerous size (approximately 3.5–4 x 3–3.5 x 1.5–2 inches) makes it ideal for display or study\u003c\/li\u003e\n\u003cli\u003eCombines geological interest with historical relevance, connecting mineral science to Viking exploration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"993\" data-end=\"1124\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eA captivating mineral specimen that blends science, history, and natural beauty for collectors, educators, and curious minds alike.\u003c\/p\u003e","brand":"The Science Museum of Minnesota","offers":[{"title":"Default Title","offer_id":67599782609193,"sku":"R6000","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1321\/7603\/files\/New_Store_Site_-_Background_Remover_3_3606d52f-faa0-4c70-a41d-83eb605b602e.png?v=1791574877","url":"https:\/\/www.theurbancharm.com\/products\/orange-iceland-spar-60-00","provider":"The Urban Charm ","version":"1.0","type":"link"}