Amethyst even if the iron concentration is low. Natural amethyst is dichroic in reddish violet and bluish violet, but when heated, turns yellow-orange, yellow-brown, or dark brownish and may resemble citrine, but loses its dichroism, unlike genuine citrine. When partially heated, amethyst can result in ametrine. Amethyst can fade in tone if overexposed to light sources and can be artificially darkened with adequate irradiation. Amethyst was used as a gemstone by the ancient Egyptians and was largely employed in antiquity for intaglio engraved gems. The largest Ancient Egyptian amethyst mines are located at Wadi el-Hudi and those mines may be the
Amethyst Stakes (7 wins): Amethyst Stakes The Amethyst Stakes is a Group 3 flat horse race in Ireland open to thoroughbreds aged three years or older. It is run over a distance of 1 mile (1,609 metres) at Leopardstown in May. The event was formerly staged at Phoenix Park. For a period it held Listed status. Known previously by sponsored titles, it was renamed the Amethyst Stakes in 1989. It was transferred to Leopardstown in 1991. The Amethyst Stakes was promoted to Group 3 level in 2007. Most successful horse since 1986 (3 wins): Leading jockey since 1986 (6 wins): Leading trainer