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Green Amethyst

Mohs Hardness: 7 
Specific Gravity:
2.65 
Reflective Index:
1.544-1.553 

The green variety of Quartz, Green Amethyst is also known as Vermarine,
Lime Citrine or Prasiolite. It is relatively rare and remains a collector's gemstone.
Green Amethyst is formed when certain types of Quartz are heated
in the presence of iron. 

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