Amethyst element impurities), and the presence of trace elements, which result in complex crystal lattice substitutions. The hardness of the mineral is the same as quartz, thus it is suitable for use in jewelry. Amethyst occurs in primary hues from a light pinkish violet to a deep purple. Amethyst may exhibit one or both secondary hues, red and blue. The best varieties of amethyst can be found in Siberia, Sri Lanka, Brazil and the far East. The ideal grade is called "Deep Siberian" and has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source)
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