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 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 …

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 …

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. …

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.

Green Amethyst - The Mineral and Gemstone Kingdom Light green gem form of Quartz that is artificially colored by heat-treating certain types of Amethyst. Also known as "Prasiolite".

Although Amethyst, the purple variety of Quartz, and Citrine, the yellow/orange variety of Quartz belong to the same scientific mineral classification, they have always been distinguished as individual …

Complete index of minerals varieties and other names.

Citrine is the yellow to orange variety of Quartz. Natural Citrine is not common; most Citrine on the gem market is produced by heat treating Amethyst and Smoky Quartz. It takes a relatively low …