Amethyst and it can not be differentiated with absolute certainty without advanced gemmological testing (which is often cost-prohibitive). There is one test based on "Brazil law twinning" (a form of quartz twinning where right and left hand quartz structures are combined in a single crystal) which can be used to identify synthetic amethyst rather easily. It is possible to synthesize twinned amethyst, but this type is not available in large quantities in the market. Single-crystal quartz is very desirable in the industry, particularly for keeping the regular vibrations necessary for quartz movements in watches and clocks, which is where a lot
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