An amethyst is a mineral that comes from quartz. It is a type of rock that is valued because of its stunning violet colour. Even though it is from quartz, it has more iron oxide (Fe2O3) than any other kind of quartz. Because of this, some experts think that its colour comes from the iron in it. Heating the amethyst either takes away its colour or changes it to a yellow hue.
Historically, the highest-quality amethysts were found in Russia and were featured in royal European jewelry. While Brazil is now the primary source of this gemstone, fine-quality amethyst can also be found in parts of Zambia, Mexico, Uruguay, Italy, Germany, Canada and the USA.
Fun Fact: Leonardo da Vinci believed amethyst had the power to control evil thoughts, to quicken intelligence, and to make men shrewd in business matters.