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 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