Roger Weller, geology instructor
email@example.com copyright 2011-R.Weller
Amethyst is simply purple quartz. At one time, long before the discovery of the
great deposits of amethyst in Brazil, amethyst was considered a valuable
gemstone, almost on par with diamonds. Only the tip of the large amethyst is
transparent enough to be made into faceted gemstones. This crystal is about 5
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Just credit photo to R.Weller/Cochise College.