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Amethyst Quartz: The purple gemstone Amethyst information and pictures 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: The purple Quartz mineral Amethyst information and pictures 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
Quartz: The gemstone Quartz information and pictures 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
African Amethyst - The Mineral and Gemstone Kingdom African Amethyst - The Mineral and Gemstone KingdomAmethyst originating from the continent of Africa This term in the gem trade usually applies to deeply colored or darker Amethyst
Amethyst Quartz - The Mineral and Gemstone Kingdom Amethyst Quartz - The Mineral and Gemstone KingdomMixture 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
The Mineral and Gemstone Kingdom: Image Photo Gallery 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 gemstones
Citrine: The quartz mineral Citrine information and pictures Citrine is the yellow to brownish-red variety of the mineral Quartz It is a widely used as a gemstone, and after Amethyst it is the most popular Quartz gem Most Citrine is formed by heat treating purple Amethyst Citrine may also be produced by heat-treating Smoky Quartz from certain localities In some Amethyst deposits, the Amethyst has been partially or fully changed over to yellow
Citrine quartz: The yellow gemstone Citrine information and pictures 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 temperature to change the color light to golden yellow, and heating to higher temperatures will give the stone a darker yellow to brownish-red color The name Citrine is derived from the citron fruit