75g Optical Calcite Freeform TC2112 inclusion Weight: 63 grams

Weight: 63 grams

Weight: 521 grams

sometimes exhibiting a beautiful twinning penetration habit

Weight: 198 grams

Give your sphere a proper place in your collection by adding a sphere stand to your order

75g Optical Calcite Freeform TC2112 inclusion Weight: 63 grams75g Optical Calcite Freeform Approx. Dimensions: 1. 5x0. 75x2. 25 inches Approx. Weight: 75 grams Locality: Maharashtra, India Optical calcite is also referred to as Iceland Spar because of its first discovery in Eskifjord, Iceland. It is typically colorless, and exhibits the optical phenomenon of double refraction where an object viewed through the calcite will appear doubled. Double refraction, or birefraction, is also called birefringence and is