Amethyst
has been popular as a gem since Pre-Roman times. The wine-loving
Greeks even believed amethyst gems could prevent intoxication while
medieval European soldiers wore amethyst amulets as protection in
battle.
Amethyst
is actually a form of Quartz - one of the most common substances
on earth. Tiny amounts of iron and aluminum turn ordinary clear
quartz into amethyst. All forms of quartz (including amethyst) are
piezoelectric, making for important applications in electronics.
Tourmaline is the only other gemstone that possesses this property.
Amethyst
ranges from pale to dark violet. The finest qualities of amethyst
are a medium dark violet with a strong secondary red color. Darker
shades of amethyst may display slight color fluctuations under different
light sources.
Information
provided by www.thaigem.com
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