Amethyst of synthetic quartz is used. Treated amethyst is produced by gamma ray, X-ray or electron beam irradiation of clear quartz (rock crystal) which has been first doped with ferric impurities. On exposure to heat, the irradiation effects can be partially cancelled and amethyst generally becomes yellow or even green, and much of the citrine, cairngorm, or yellow quartz of jewelry is said to be merely "burnt amethyst". The Greek word "amethystos" may be translated as "not drunken", from Greek "a-", "not" + "methustos", "intoxicated". Amethyst was considered to be a strong antidote against drunkenness, which is why wine goblets were
Amethyst brown dove Amethyst brown dove The amethyst brown dove ("Phapitreron amethystinus") is a species of bird in the family Columbidae. It is endemic to the Philippines. It occurs on most large islands except Palawan but is generally rather scarce on Luzon and Mindanao and even rarer elsewhere. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. It is found in lowlands but probably prefers middle and high elevations at 500-2000m. It is most often seen singly or in pairs, in and around fruiting trees. The call is a deep, sonorous "hoop" as well as