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 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 It is usually colored by heat treatment of amethyst or smoky quartz. 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.
The unique color combination of ametrine has sparked an interest and appeal to this distinctive gemstone. 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 In some amethyst deposits, the amethyst has been partially or fully changed over to yellow. 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. Back to minerals list | filter list a b c d e f g h i j k l m n o p q r s t u v w x y z all Amethyst from rhode island from diamond hill, ashaway, south of hopkinton, washington county, rhode island 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
