Rock salt is a mineral formed from sodium chloride. It's chemical formula is NaCl and this also includes other variations of salt such as common salt and table salt.
It forms as isometric crystals and is typically colourless or white, but may also be other colours depending on the amount and type of impurities contained within it. The salt occurs in beds of sedimentary evaporite minerals. This is caused by large lakes and seas drying up. These salt beds can be hundreds of metres deep.
Rock salt is not sold for use directly on food. It is used to make ice cream and deicing.
You know that too much salt is bad for you and you probably know that salt is either mined from rocks or extracted from the sea, so, here are ten more facts about salt that you might not have known shared by Beautyandtips.com.