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. 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 amethyst, the purple variety, is the most popular and valuable quartz gemstone
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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. 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. Amethyst from rhode island from diamond hill, ashaway, south of hopkinton, washington county, rhode island
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