Amethyst: The violet-purple form of Rockcrystal Quartz (SiO2 ) is called Amethyst. For centuries the stone is known as a famous jewel but also as a healing stone. With temperatures above 100 degrees Celsius the Amethyst may loose colour or change to a yellow-orange citrin colour, depending on the mineralogical composure of the stone. World-famous are the huge Amethyst geodes from Uruguay, which evolved in porous Lava rock with circulating mineral fluids. Our Amethyst comes from Brazil/Uruguay, India or Tanzania. Different types of Amethyst like the Scepter, Chevron or Super Seven are popular in the healing stone community.