357g Optical Calcite Freeform TC2009 bob ross Weight: 1036 grams

Weight: 1036 grams

Azurite is a soft blue copper mineral produced by weathering of copper ore deposits

Locality: Brazil

Trapped gasses formed cavities within the rhyolite

357g Optical Calcite Freeform TC2009 bob ross Weight: 1036 grams357g 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