Aventurine is a member of the Quartz family, a silicon dioxide mineral with a hardness of 7. Its structure is hexagonal (trigonal) and is crypto-crystalline. Its name is derived from the Italian a ventura, a type of glass discovered around the year 1700. The name was chosen because of the likeness of the glass with its randomly spaced iridescent sparkles to these stones with their similar markings. Aventurine is found primarily in three colors-green, blue and red-brown. The color of Green Aventurine comes from microscopic Fuchsite particles within the Quartz, and the color of Red Aventurine comes from inclusions of Hematite. Blue Aventurine is colored by inclusions of copper silicates. Major deposits of Aventurine are found in Brazil, India and Russia.