Roger Weller, geology instructor
firstname.lastname@example.org 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
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.