Actually the Defiance Mine of Gleeson, Arizona is rather known for its great Wulfenite specimens and Calcite pieces from there are rather uncommon or probably underrepresented. But here we have a beautiful small cab of bladed and glassy, bicolured Calcite crystals. The display side features a slightly brick red colour wheras the backside is colourless with a hint of amber. The crystals are almost sharp and gemmy and well terminated. Very good overall aesthetics of this 360° piece.