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Learn about tourmaline, a group of boron silicate minerals with a wide range of colors and color combinations. Find out how tourmaline forms, where it occurs, and how it is used as a gem and a mineral specimen. Learn about the 15 different types of tourmaline, a group of minerals with stunning colors and electric properties. Discover where to find them in various geological settings around the world. Learn about tourmaline, a fascinating gemstone with a wide range of colors and unique properties. Discover its composition, crystal structure, formation, occurrence, types, history, uses, and more. Tourmaline (/ ˈtʊərməlɪn, - ˌliːn / ⓘ TOOR-mə-lin, -leen) is a crystalline silicate mineral group in which boron is compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. This gemstone comes in a wide variety of colors.
