Amethyst . A member of the quartz family, amethysts with intense, rich purple shades have long been considered the most ...

Amethyst, a variety of quartz with a vivid purple color, is the birthstone for February. Purple is a highly sought color for ...

Purple may not be a popular color for automobiles ... Instead, the 300 makes due with a more subtle shade of purple that is officially called Amethyst, named after the quartz crystal.