Quartz varieties

Amethyst is a violet variety of quartz. Ancient Greeks wore amethyst and carved drinking vessels from it in the belief that it would prevent intoxication. Amethyst, a semiprecious stone, is often used in jewelry. It occurs mostly in association with calcite, quartz, smoky quartz, hematite, pyrite, fluorite, goethite, agate, and chalcedony.

mineral, yellow quartz var.

quartz variety

mineral, quartz variety

Ametrine, also known as trystine, golden amethyst, or by the trade name bolivianite, is a variety of quartz with alternating zones of purple and yellow-orange coloration. Its name is a portmanteau of amethyst and citrine. While ametrine is commonly referred to as a combination of these two quartz varieties, some sources claim this is not accurate. Almost all commercially available ametrine is mined in Bolivia.

form of the mineral quartz, found in nuclear test sites and meteor impact zones

Prasiolite (also known as green amethyst or vermarine) is a green, transparent variety of quartz that derives its color from the presence of ions within the crystal structure. Prasiolite is not the only green variety of quartz, and it should not be confused with prase, chrysoprase, chrome chalcedony, or quartz colored by inclusions of chlorite or epidote.

quartz variety, rock crystal with rutile inclusions

Diamond-like with quality Quartz Crystal with natural faceting and points on both sides

Calcite mineral