Amethyst of synthetic quartz is used. Treated amethyst is produced by gamma ray, X-ray or electron beam irradiation of clear quartz (rock crystal) which has been first doped with ferric impurities. On exposure to heat, the irradiation effects can be partially cancelled and amethyst generally becomes yellow or even green, and much of the citrine, cairngorm, or yellow quartz of jewelry is said to be merely "burnt amethyst". The Greek word "amethystos" may be translated as "not drunken", from Greek "a-", "not" + "methustos", "intoxicated". Amethyst was considered to be a strong antidote against drunkenness, which is why wine goblets were
HMS Amethyst (1799) "Jonge Jacob". Captain Michael Seymour replaced Spranger. On 15 May 1807, "Amethyst" captured the privateer "Josephine" some 20 leagues from Scilly. "Josephine" was armed with four 2-pounders guns and small arms. She had a crew of 45 men, but had put ten on board "Jane", which had been sailing from Lisbon. "Josephine" had sailed from the Île de Batz and "Jane" was her only capture. When "Amethyst" captured "Josephine", "Amethyst" was in company with and . Then on 9 September "Amethyst" captured the Danish ship "Twende Venner". Later, on 18 October, "Amethyst" recaptured the ship "Susannah". "Amethyst" also recaptured the