607g Optical Calcite Freeform TC1977 prehnite One tabby is attached to

One tabby is attached to a diamond shaped double terminated crystal at the base

Opal Ring Size 6

is the bodhisattva of great compassion

Dimensions: 4x2

Great glassy luster on this vibrant yellow fluorite from Moscona Mine in Spain

607g Optical Calcite Freeform TC1977 prehnite One tabby is attached to607g Optical Calcite Freeform Approx. Dimensions: 3x2. 5x2. 75 inches Approx. Weight: 607 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