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)
HMS Amethyst (1799) American brig "Rising Sun". On 10 March 1808 "Amethyst" captured the Spanish brig "Vigilantie". Eleven days later "Amethyst" recaptured the Portuguese schooner "Inseperavil Unio". On 3 May "Amethyst" and captured the French sloop "Actif". Sixteen days later, "Amethyst", "Conflict", and were in company when they captured the French schooner "Annais". The next month, on 10 June, "Amethyst" and "Conflict" captured the Spanish schooner "Carmelita". Fourteen days later, "Amethyst" captured the American brig "Sally Tracey". Then "Amethyst" was again in company with "Growler" when they captured "St. Etienne", "Maria Julia", and six chasse marees on 9 July. Lastly, on 17 September