hydrochloric acid fizzes on calcite; perfect cleavage in 3 directions gives rhomb-shaped fragments Halite White Greenish tint; 2½ salty taste; dissolves in water; cube-shaped cleavage fragments Muscovite (white White Light colored; 2-2½ mica) splits into thin, flat, transparent sheets that will bend without breaking Serpentine White Two kinds: silky 2½-4 and fibrous, waxy and platy Sulfur White or pale Greenish; will 1½-2½ yellow burn with a blue flame; commonly found as crystals, crusts, or grains C. Cannot be scratched by a copper penny but can be scratched by an ordinary pocket knife Fluorite White Cleavage in 4 4 directions can give fragments shaped like octahedrons; crystals commonly cubes Malachite Green Bright green 3½-4 color; dilute hydrochloric acid will fizz on malachite Serpentine White Two kinds: silky 2½-4 and fibrous, waxy