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

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

These substitutions alter how the mineral absorbs and reflects light, resulting in color. Let’s look at some examples. Amethyst, a type of quartz, owes its captivating purple hue to the presence ...