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. The hexagonal crystal structure can vary in size from microcrystalline drusy to large scepters and often forms inside agate geodes. South Brazil is rich in minerals found in its mountainous basalt rock formations.

• Due to the size and weight of this item, it is Pick Up Only from the HMNS Hermann Park location