{"product_id":"large-optical-calcite-icelandic-spar","title":"Optical Calcite - Large (Icelandic Spar)","description":"\u003cp\u003e\u003cstrong\u003eLarge Optical Calcite Crystal (Icelandic Spar)\u003c\/strong\u003e is a natural rough optical calcite specimen with a more opaque, milky quality and stunning natural rainbows visible inside the crystal. Optical calcite, also known as Icelandic Spar, is a transparent to translucent variety of calcite historically prized for its powerful double refraction — the ability to split light into two beams, creating a doubling effect when placed over text or images. This large rough piece at approximately 8.2 oz has beautiful natural rainbows that catch the light.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Makes This Optical Calcite Special:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNatural rough optical calcite (Icelandic Spar) with a more opaque, milky quality\u003c\/li\u003e\n\u003cli\u003eStunning natural rainbows visible inside the crystal, created by internal light refraction\u003c\/li\u003e\n\u003cli\u003ePowerful double refraction — splits light into two beams, a fascinating natural optical phenomenon\u003c\/li\u003e\n\u003cli\u003eLarge size at approximately 8.2 oz, a substantial and commanding display piece\u003c\/li\u003e\n\u003cli\u003eRaw, unpolished natural formation with beautiful natural cleavage planes\u003c\/li\u003e\n\u003cli\u003eOne-of-a-kind natural optical calcite specimen\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHow to Use Your Optical Calcite:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlace on a shelf or altar as a striking natural statement piece\u003c\/li\u003e\n\u003cli\u003eHold up to light to observe the stunning double refraction and natural rainbows\u003c\/li\u003e\n\u003cli\u003eUse in meditation spaces to encourage mental clarity, focus, and amplified intention\u003c\/li\u003e\n\u003cli\u003eA fascinating conversation piece and educational specimen for crystal lovers and collectors\u003c\/li\u003e\n\u003cli\u003eA meaningful and impressive gift for crystal enthusiasts, mineral collectors, and anyone drawn to rare optical phenomena in nature\u003c\/li\u003e\n\u003cli\u003ePairs beautifully with clear quartz, selenite, and other clarity-enhancing crystals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCrystal Details:\u003c\/strong\u003e\u003cbr\u003eThis is a natural optical calcite (Icelandic Spar) specimen. Transparency, rainbow placement, and natural cleavage patterns will vary as each piece is naturally formed. Photos shown are of the actual crystal available.\u003c\/p\u003e","brand":"Rock This Way Crystal Shop","offers":[{"title":"Default Title","offer_id":53162810081574,"sku":"ICE-SPAR-L-D","price":65.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/8293\/9686\/files\/OPTICAL-CALCITE-LARGE-WHITE-BACKGROUND.jpg?v=1778876578","url":"https:\/\/www.rockthiswaycrystalshop.com\/products\/large-optical-calcite-icelandic-spar","provider":"Rock This Way Crystal Shop","version":"1.0","type":"link"}