Cat's Eye Quartz, also known as Aventurine Quartz or "Tiger's Eye Quartz," is a variety of quartz that exhibits a mesmerizing optical phenomenon called chatoyancy, which creates a band of light across the surface of the stone that resembles the eye of a cat. This effect is caused by the presence of tiny, parallel inclusions within the quartz. Cat's Eye Quartz is typically found in shades of yellow, gold, and brown, and is believed to bring good luck, protection, and balance to its wearer. It is often used in jewelry and as a decorative stone.
