Are there any folklore or history about opals?

Opals have a rich history and are steeped in folklore. In ancient times, they were believed to possess protective qualities, thought to bring good luck and fortune to their wearers. The Romans considered opals to be the most precious of gemstones, associating them with love and hope. Conversely, in some cultures, particularly during the Middle Ages, opals were thought to bring misfortune if not owned by someone who had the same eye color as the stone.