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) of York to the Netherlands and later participated in the evacuation of the force following the campaign's collapse. On 18 December she and recaptured the brig "Jenny". Eleven days after that, "Amethyst" and "Beaulieu" recaptured the ships "Dauphin", "Cato", "Cabrus", and "Nymphe". On 29 December "Amethyst" captured the French privateer brig "Aventurier" (or "Avanture"). "Aventurier", out of Lorient, was armed with 14 guns and had a crew of 75 men. One month earlier, on 29 November, "Aventurier" had captured the American ship "Cato" and taken her master, John Parker, and his crew prisoner. When "Amethyst" captured "Aventurier" Cooke freed the