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Tradition
MONTH: February
ANNIVERSARY: 6th and 17th
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Chemistry
MINERAL: Quartz
CHEMICAL COMPOSITION: SiO2
COLOR: All shades of purple
REFRACTIVE INDEX: 1.544 to 1.553
SPECIFIC GRAVITY 2.66
MOHS HARDNESS: 7
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Geodes
In gem localities like Brazil, amethyst sometimes forms in hollow, crystal-lined geodes so big you can stand in them.
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Affordable
Even fine amethyst has a modest price tag. Large gems remain affordable as price per carat does not rise dramatically with larger size.
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Ametrine
In Bolivia, amethyst and citrine occur in the same crystal. The unique gems, called ametrine, are half purple and half yellow.





















