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) kept "Amethyst" from joining the action. The British brought "Dédaigneuse" into Royal Navy service as HMS "Dedaigneuse". Later on 28 January "Sirius" and "Amethyst" captured the Spanish Letter of Marque "Charlotta" (or "Carlotta") of Ferol, 16 hours out of Ferol on her way to Curaçao. The capture took place about six or seven leagues from Cape Belem in Galicia. The hired armed cutter "Earl St Vincent" shared in the capture. The next day captured the Spanish privateer "Intrepido Cid". "Amethyst" and "Sirius" shared in the prize money by agreement. On 16 March, "Amethyst" encountered and captured "Nostra Signora del Carmen",