Part of the Earth's Treasures Collection, this beautiful natural amethyst crystal is set in a free form handmade setting. Ring is one size fits all, adjustable, made of hammered sterling silver. No two rings are alike as the crystal determines the style. One of a kind Natural Amethyst Crystal Sterling Silver Freeform Crystalline quartz in shades of purple, lilac or mauve is called amethyst, a stone traditionally worn to guard against drunkeness and to instill a sober mind. The word amethyst comes from the Greek meaning "without drunkenness" and amethyst is believed to protect one from poison.