Amethyst even if the iron concentration is low. Natural amethyst is dichroic in reddish violet and bluish violet, but when heated, turns yellow-orange, yellow-brown, or dark brownish and may resemble citrine, but loses its dichroism, unlike genuine citrine. When partially heated, amethyst can result in ametrine. Amethyst can fade in tone if overexposed to light sources and can be artificially darkened with adequate irradiation. Amethyst was used as a gemstone by the ancient Egyptians and was largely employed in antiquity for intaglio engraved gems. The largest Ancient Egyptian amethyst mines are located at Wadi el-Hudi and those mines may be the
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