Rosenhahnite

General Information: Chemical Formula:Ca3Si3O8[(OH)2-4x,(CO3)x] Composition:(Molecular Weight = 366.50 gm)Calcium 32.81 % CaSilicon 22.99 % SiHydrogen 0.55 % H Oxygen 43.65 % O  Empirical Formula: Ca3Si3O8(OH)2 Environment:High pressure metamorphic mineral found in greywackes and serpentinites. IMA Status:Approved IMA 1967 Locality:TL: Russian River, 5 miles NNW of Colverdale, Mendocino Co., California. Name Origin:Named for Leo Rosenhahn (1904-1991), American amateur mineralogist, who found the mineral.Physical Properties: Cleavage:[001] Perfect, [100] Good, [010] Good Color:beige white or colorless. Density:2.89 Diaphaniety:Transparent to Translucent Habits:Tabular - Form dimensions are thin in one direction., , Hardness:4.5-5 Luminescence:Fluorescent, Short UV=yellowish green, Long UV=light orangish pink. Streak:whiteMore details...