Halite White Reddish tint; 2½ salty taste; dissolves in water; cube-shaped cleavage fragments Sulfur White or pale Reddish; will 1½-2½ yellow burn with 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 Anhydrite White Pinkish tint; 3-3½ commonly occurs as sugary-looking masses Barite White Pinkish tint; 3-3½ rather heavy; cleavage fragments may look flat and slab-like Dolomite White Pink color; 3½-4 commonly occurs as granular masses and as rhomb-shaped crystals; dilute hydrochloric acid may fizz slightly on dolomite Fluorite White Pink color; 4 cleavage in 4 directions can give fragments that are shaped like octahedrons; crystals commonly cubes Opal White Reddish color; 5-6 curved, conchoidal fracture; may