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 (1903) the buoys in the outer harbour. "Amethyst"s boats assisted in rescuing the survivors. For much of the autumn of 1915, "Amethyst" stayed in port and acted a temporary depot ship for British submarines passing through on patrol. On 19 November, "Amethyst" headed towards Malta and thence to Gibraltar, arriving on 27 November. On 1 December she set out for Portsmouth, and then on 11 December for Barrow-in-Furness where she moored up in Devonshire Dock. She remained there until 14 March 1916 when she headed south to Plymouth, then Bilbao and arriving in Gibraltar on 23 March. In 1916 Commander Edward