Length: 40 cm (16 Inches) Weight: 94g (3.3 Ounces) Amethyst is a purple variety of quartz often used as an ornamental stone in jewellery. The name comes from the Hellènic a- ("not") and methustos ("to intoxicate"), a reference to the belief that the stone protected its owner from drunkenness; the ancient Greeks and Romans wore amethyst and made drinking vessels of it in the belief that it would prevent intoxication.