Place an order for Amethyst Rune Sets online at Natural Agate. Amethyst is a violet variety of quartz. The ancient Greeks wore amethyst and carved drinking vessels from it in the belief that it would prevent intoxication. Amethyst is a semiprecious stone often used in jewelry and is the traditional birthstone for February. Runes are used in divination and charms. They have been used since the ancient times for these purposes. You might not know where to start when it comes to knowing how to use magick runes. It does take a little getting used to to seamlessly incorporate them in your magical workings.