“Do I have to get rid of my salt shaker?” No, it’s your kitchen and you can season it however you’d like. However, have a rainbow of salts at your fingertips and you’ll be giving that white plastic cylinder its final shake.
All salts that are derived from briny water are essentially produced the same way: the water is heated, the liquid H2O evaporates, leaving the NaCl and other trace components behind. (That’s sodium chloride, for you non-chemistry buffs.)
Photo courtesy The Great Salt War