Amethyst Formation on Metal Stand

Amethyst, the birthstone for February, is one of our most popular gemstone materials. Amethyst forms in long, prismatic crystals in geodes or hallow rocks. These geodes form when there are cavities in volcanic rock. As the rock cools, the mineral-saturated water, gases and volcanic material distill and crystallize. When these crystals harden, they form amethyst. Although generally more of a deeper purple, the stone can also have a reddish-purple tinge, or a very pale purple tinge that fades into a lilac.