Aquamarine Cat's-eye, The Sparkling Birthstone for July 20th
Birthstone for July 20th: Aquamarine Cat’s-eye Description of Aquamarine Cat’s-eye Aquamarine Cat’s-eye is a mesmerizing gemstone known for its captivating optical effect, often referred to as the “chatoyancy” effect. The term “Cat’s-eye” describes a phenomenon in which a narrow, bright, and moving line appears on the surface of the gem, resembling the slit-pupil of a cat’s eye. This effect is created by the alignment of fibrous inclusions within the stone that reflect light in a way that gives it a luminous, glowing line across its surface....