"Green amethyst" is a misnomer since the term "amethyst" applies only to the purple variety of quartz. However, that doesn't stop the marketing of these less valuable pale amethyst stones after irradiation and/or heat treatments turn the color green. This fact is not meant to imply that "green amethyst" is not a beautiful stone, because it it very attractive.
Properly, after treatment, this green variety should be marketed as Prasiolite or Green Quartz, not green amethyst, and it should not be marketed as "rare" since there is an abundance of pale lavender quartz which can be treated to produce a light spring green stone.
For more information: http://www.stoneagejewels.com/amethyst.htm
Properly, after treatment, this green variety should be marketed as Prasiolite or Green Quartz, not green amethyst, and it should not be marketed as "rare" since there is an abundance of pale lavender quartz which can be treated to produce a light spring green stone.
For more information: http://www.stoneagejewels.com/amethyst.htm
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