Natural Optical Calcite Cube Rhomboid 60-70 mm

Highly unusual rhomboid classic form with light lavender cast to each crystal.Calcite, which gets its name from "chalix" the Greek word for lime, isa most amazing and yet, most common mineral. It is one of the most common minerals on the face of the Earth, comprising about 4% by weight of the Earth's crust and is formed in many different geological environments. Calcite can form rocks of considerable mass and constitutes a significant part of all three major rock classification types.