WollastoniteCaSiO3
Class: Silicate Subclass: Pyroxene Hardness: 4.5 - 5 Density: 2.9 - 3.1 Streak: White Lustre: Vitreous Habit: Mass of acicular to fibrous grains Colours: White, gray or pale green | | Crystal System: Triclinic Cleavage: Perfect Fracture: Splintery Magnetism: None Reaction with HCl: Weak | Identification in hand sample: Resembles tremolite, but has different cleavage. Associations: Common in metamorphed limestone and dolomite. Industrial / ecomonic uses: Replacement for chrysotile asbestos in fire-resistant building supplies. Also used in paints, film and plastics. |