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 Initiative 21 is a socially and medically sound policy that helps parents, schools and law enforcement protect our youth from the potentially life-threatening effects of underage drinking." Choose Responsibility argues that scientific evidence supports the Amethyst Initiative's views and goals, and refutes some of MADD's past claims. Sanford Ungar, president of Goucher College and signee of the initiative argues that opponents should not fear because the Amethyst Initiative is about opening up the debate to improve alcohol policy. He brings about the misconception that they want to "polarize" the issue at hand, but instead wishes to find a better alternative to