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
Amethyst, Princess of Gemworld Mordiel, who has usurped control of their house. Amethyst later joins the Justice League Dark upon being brought to Earth in an effort to reconnect Tim Hunter with magic. Amethyst remains on the team in order to recover the portal stone that John Constantine has stolen. She is told not to trust any promises Constantine has made. Soon after, she has an adventure while exploring the House of Mystery with her allies Black Orchid and Frankenstein. They destroy several malicious threats that try to devour them. During the "Trinity War" storyline, Amethyst is among the superheroes that feel the disturbance