607g Optical Calcite Freeform TC1977 prehnite Faceted smokey quartz ring set

Faceted smokey quartz ring set in sterling silver

so they have been given the name "trapiche"

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

Dimensions: 4x2

607g Optical Calcite Freeform TC1977 prehnite Faceted smokey quartz ring set607g 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