Approximate size of the piece: 3 - 4 cm Approximate weight: 10 - 13 g Origin: Brazil The parts that will be delivered are similar to those in the photographs Amethyst is a variety of quartz of magmatic and hydrothermal origin. Its violet color is due to the iron oxide content and the fact that it was subjected to high temperatures during its formation. The intensity of the color is usually concentrated at the tips of the crystals and sometimes it can also have bands of milky quartz.