Amethyst is the purple variety of the mineral Quartz, and is its most famous and valuable gem variety. Quartz also contains other gemstones such as Citrine, Rose Quartz, and Smoky Quartz. The color of Amethyst is most often caused by iron impurities, though it can also be colored by natural radiation exposure. Amethyst is sometimes heat treated to deepen the color, or to transform it into ...
Amethyst is a well known mineral and gemstone. It is the purple variety of the mineral Quartz, and its most valuable and prized variety. Its name derives from the Greek "amethystos", which means "not drunken", as Amethyst in antiquity was thought to ward off drunkenness. The color of some Amethyst specimens from certain localities slowly fade upon prolonged exposure to light. When used as a ...
Canadian Amethyst - The Mineral and Gemstone Kingdom Amethyst with an internal coating of red Hematite under the crystal surface, found near Thunder Bay, Ontario, Canada.
Amethyst from Rhode Island from Diamond Hill, Ashaway, south of Hopkinton, Washington County, Rhode Island
Amethyst Quartz - The Mineral and Gemstone Kingdom Mixture of Amethyst and Milky Quartz (or clear Quartz). It is purple on top and white or clear on the bottom. It may also be banded purple and white. Amethyst Quartz is usually tumbled or polished into beads.
Amethyst Amethyst, the purple variety, is the most popular and valuable Quartz gemstone. Amethyst ranges from light to dark purple. See the Amethyst gemstone page for more details. Citrine Citrine is the yellow, orange, or reddish-brown variety of Quartz. It is usually colored by heat treatment of Amethyst or Smoky Quartz.