Tiger's eye is a golden-brown, chatoyant gemstone known as the stone of courage, protection, and clear-sighted confidence. Its shifting bands of light resemble a big cat's eye, symbolizing sharp focus, willpower, and inner strength. Tiger's eye is not an official birthstone on the modern calendar, but alternative and mystical traditions link it to the zodiac sign Gemini (May 21–June 21) and occasionally connect it as an alternative birthstone for June or November.