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 Incident Amethyst Incident The "Amethyst" Incident, also known as the Yangtze Incident, was a historic event which involved the Royal Navy ship HMS "Amethyst" on the Yangtze River for three months during the Chinese Civil War in the summer of 1949. On 20 April 1949, HMS "Amethyst", commanded by Lieutenant Commander Bernard Skinner, was on her way from Shanghai to Nanking to replace , which was standing as guard ship for the British Embassy there during the Chinese Civil War between the nationalist Kuomintang led Republic of China and the Communist Party led People's Republic of China. According to the Royal