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 Initiative Amethyst Initiative The Amethyst Initiative is an organization made up of U.S. college presidents and chancellors that in July 2008 launched a movement calling for the reconsideration of U.S. legal drinking age, particularly the minimum age of 21. The National Minimum Drinking Age Act of 1984 requires all US states to raise their minimum age for purchase and public possession of alcohol to 21 or face a reduction in highway funds under the Federal-Aid Highway Act. The Amethyst Initiative was initiated by John McCardell, founder of Choose Responsibility, a former professor of history at Middlebury College in Middlebury, Vermont and