The second most abundant mineral in the Earth's crust, Quartz is often praised for its clarity and the many colors it can form as. These variations (Amethyst, Citrine, Rose Quartz, etc.) form due to impurities in the Quartz crystal when Iron, Manganese, and other ions are present while the crystal is forming. The pure form of Quartz is white or clear, depending on the conditions of the crystals environment during formation- trapped gas and liquid in the crystal can keep the Quartz from appearing clear and instead have a white appearance.

Amethyst has been a prized gem for centuries. Amethysts are the most valuable variety of quartz, and were one of the first gemstones used by people around the world. The Greeks believed that drinking wine from an amethyst cup would prevent intoxication. Royalty has also favored the purple gemstone, and at one time amethysts were reserved for royalty alone.