357g Optical Calcite Freeform TC2009 ruby zoisite The structures were empty tubes

The structures were empty tubes

Weight: 1145 grams

Weight: 44 grams

Thulite Ring Size 8

357g Optical Calcite Freeform TC2009 ruby zoisite The structures were empty tubes357g Optical Calcite Freeform Approx. Dimensions: 2. 5x2x2. 5 inches Approx. Weight: 357 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 also