Purple amethyst are semi-precious gemstone and belong to family of quartz. Its most popular in violet color stones. The name amethyst is taken from Greek and their is story also that they belief that the stone protected his owner from drunkenness. It is also birthstone of zodiac sign Aquarius. People also believe that its help to relives stress and strain, soothes irritability, balance mood swings, dispels anger, rage, fear and anxiety.