Optical Calcite Freeform TC2017 petrified wood 4" Blue Smoke Colombian Lemurian

4" Blue Smoke Colombian Lemurian

Sprays of gold rutile are packed into this polished quartz tower from Novo Horizonte

Weight: 164 grams

Ammonite Ring Size 8

This unique sphere was carved from a single fossilized wooly mammoth tooth

Optical Calcite Freeform TC2017 petrified wood 4" Blue Smoke Colombian LemurianOptical Calcite Freeform Approx. Dimensions: 2. 5 x 1. 75 x 3 inches Approx. Weight: 420 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