Amethyst and it can not be differentiated with absolute certainty without advanced gemmological testing (which is often cost-prohibitive). There is one test based on "Brazil law twinning" (a form of quartz twinning where right and left hand quartz structures are combined in a single crystal) which can be used to identify synthetic amethyst rather easily. It is possible to synthesize twinned amethyst, but this type is not available in large quantities in the market. Single-crystal quartz is very desirable in the industry, particularly for keeping the regular vibrations necessary for quartz movements in watches and clocks, which is where a lot
HMS Amethyst (1903) March 1914 from Vice Admiral Carden. On 24 April 1915 "Amethyst" and her sister-ship embarked soldiers and landed them by trawler at Y beach on the northwest shore of the Gallipoli Peninsula in the early morning of 25 April. She supported the British troops ashore with gunfire until 27 April by bombarding enemy positions. By mid-morning on 27 April, with the situation on the beach described as "desperate", surviving troops were beginning to come back on board - "Amethyst" took on board over 250 officers and men, many of them wounded. Over the following days, "Amethyst" continued to provide support