Essential Tips for Caring for Amethyst Jewelry Amethyst has a strong emotional connection and is commonly known as the birthstone of February. This soothing stone offers countless benefits, so it's not just for February babies. The rich, glittering stone known as amethyst, which comes in a variety of hues from dark purple to violet, has long been associated with royalty. During the Middle Ages, this stone was actually only worn by aristocrats. Thankfully, everyone can now wear and cherish amethyst crystals.