922g Optical Calcite Freeform TC1985 byssolite Weight: 30 grams

Weight: 30 grams

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922g Optical Calcite Freeform TC1985 byssolite Weight: 30 grams922g Optical Calcite Freeform Approx. Dimensions: 4x3x3 inches Approx. Weight: 922 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