Physical Properties of Calcite: Chemical Classification: Carbonate: Color: Usually white but also colorless, gray, red, green, blue, yellow, brown, orange: Streak: White: Luster: Vitreous: Diaphaneity: Transparent to translucent: Cleavage: Perfect, rhombohedral, three directions: Mohs Hardness: 3: Specific Gravity: 2.7: Diagnostic Properties
Explanation: