Dims: 11.8 x 8.0 x 2.4" (30.0 x 20.3 x 6.1 cm)
Wt: 4 lbs., 15.2 oz. (2.245 kg)
Minas Gerais, Brazil
Countless minute, tabular Calcite crystals form a large crust that covers the host rock of this large cabinet specimen. They are in surprisingly good condition- very few are visibly damaged- and generally do not exceed 0.1" (3 mm) in diameter or thickness. There are a few larger, prismatic crystals, but these are heavily intergrown with the crust and do not exceed 0.4" (1 cm) in length or diameter. All have good trigonal form with shallow pyramidal terminations. They are generally colorless and transparent, though some of the larger crystals show a milky translucence. All have a pearly luster. This crust coats a thin crust of heavily-intergrown, crysatalline quartz that in turn coats a layer of green host rock.