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) the Île de France some nine weeks earlier and was sailing for Bordeaux with a cargo of cotton, coffee, tea, sugar, indigo, and the like. Still in company with "Nymphe", "Amethyst" captured "Julius Pringle" and recaptured "Active" (4 March) and "Amity" (21 March). Then on 31 March, "Amethyst", with "Nymphe", captured the French privateer "Mars". "Mars" was armed with twenty 12-pounder guns and two 36-pounder obusiers, and carried a crew of 180 men. Cooke described her as being "one of the finest Privateers fitted out of Bourdeaux." The British took "Mars" into service as . "Amethyst" also captured a valuable