Halite's the mineral form of sodium chloride, NaCl, commonly known as rock salt. Halite forms isometric crystals. The mineral's typically colorless to yellow, but may also be light blue, dark blue, and pink depending on the amount and type of impurities. It commonly occurs with other evaporite deposit minerals such as several of the sulfates, halides and borates. Occurrence Halite occurs in vast beds of sedimentary evaporite minerals that result from the drying up of enclosed lakes, playas, a… (More on Halite)