Most distinguishing features:Gives off a rotten-egg smell in HCl, very high SG, very metallic lustre.
Industrial/economical uses:Main ore from which lead is extracted, also a source of silver.
Other names/forms:Pyrope, Grossular, Almandine
Most distinguishing features:Crystal habit, colour and hardness.
Industrial/economical uses:Abrasives (particularly sandpaper), semi-precious gemstone.
Most distinguishing features:Softness and lustre are best indicators.
Industrial/economical uses:Used in pencil leads and as a dry lubricant.