Tag Archives: calcite

Description: Calcite (KAL-site) is a mineral species; hexagonal (trigonal) crystal system. Appearance: • transparent to opaque• almost all colors• phenomena: chatoyancy (in satinspar variety) Variety and Trade Names: • marble – granular aggregate occurring in many colors• onyx marble – banded marble Identification: Optic Character: DR, uniaxial negative; AGG Refractive Index: 1.486-1.658 Specific Gravity: 2.70 (+-.05)Hardness: 3 ; […]