Some Common Minerals and their Properties Name Color Streak Luster Hardness Other Properties Graphite Black Black Metallic 1 Crystals are rare Mica Colorless White Pearly 2.5-3 Flakes into sheets Halite Colorless White Glassy 2.5 Salty taste Galena Gray Gray Metallic 2.5-3 Crystal Cubes Calcite Colorless White Glassy 3 Crystalline Magnetite Black Black Dull 5.5-6.5 Magnetic Pyrite Golden Black Metallic 6-6.5 Looks like gold Feldspar Various White Glassy 6-6.5 Two cleavages Quartz Various White Glassy 7 Round fracture Corundum Gray White Glassy 9 Crystalline (source)
