How are minerals left behind by evaporation?
When minerals from the solution water dry up, they can evaporate. If you place salt in water and stir it completely, then wait for it to evaporate, salt crystals will be only of what’s left. Thick deposits of halite formed through many of millions of years in seas that have evaporated so far. Useful minerals have also been used from evaporating from water. Some like Gypsum used for building materials, Calcite Crystals, used for microscopes, and also minerals like potassium, used for fertilizer.
