Where does salt come from?

Sources. Salt comes from two main sources: sea water and the sodium chloride mineral halite (also known as rock salt). Rock salt occurs in vast beds of sedimentary evaporite minerals that result from the drying up of enclosed lakes, playas, and seas. Salt beds may be up to 350 m thick and underlie broad areas.

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Correspondingly, what are the 7 types of crystals?

The seven crystal systems are triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, and cubic. Are gems rocks? Gemstones are usually minerals (but sometimes rocks) to which we give more value and that jewelers can make into something attractive. And rocks are made up of all kinds of minerals, and there are thousands and thousands of different types of minerals.

Is Obsidian a mineral?

Because obsidian is not comprised of mineral crystals, technically obsidian is not a true "rock." It is really a congealed liquid with minor amounts of microscopic mineral crystals and rock impurities. Obsidian is relatively soft with a typical hardness of 5 to 5.5 on the mineral hardness scale. Are diamonds rocks? diamond, a mineral composed of pure carbon. It is the hardest naturally occurring substance known; it is also the most popular gemstone. diamond. country mine production 2006 (carats)* % of world mine production Russia 15,000,000 17.6 South Africa 9,000,000 10.6 Botswana 8,000,000 9.4 China 1,000,000 1.2 8 more rows