Rock salt

Halite, also known as rock salt, originates from the rocky layers of the Earth’s crust and forms from ancient bodies of water. It differs from table salt and kosher salt, which predominantly result from flooding underground salt deposits with freshwater and subsequently evaporating the water to obtain pure salt crystals. Producing sea salt, a smaller proportion of cooking salt, involves evaporating seawater. In contrast, extracting rock salt directly from the earth maintains its distinctive cube-shaped crystalline structure.

Rock salt contains additional minerals and impurities, which make it unsuitable for human consumption. However, it does have culinary applications, such as making ice cream and maintaining the coldness of coolers. These uses stem from salt’s unique property of lowering the melting point of water. Consequently, when salt is added to ice water, the temperature can drop as low as 6 degrees below zero (F) without freezing solid.

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