84g Optical Calcite Freeform TC2115 citrine Dimensions: 8 x 5

Dimensions: 8 x 5

Locality: Mikheevskiy Mine

Dimensions: 3 x 1

357g Optical Calcite Freeform

also spelled Kuan Yin or Guan Yin

84g Optical Calcite Freeform TC2115 citrine Dimensions: 8 x 584g Optical Calcite Freeform Approx. Dimensions: 1. 25x1. 25x1. 75 inches Approx. Weight: 84 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