The Chrysoberyl cat's eye is a miracle of Nature! This gem has a thin bright Silver band of light on a shimmering golden background, and glides across the surface.
Fine inclusions in the stone are responsible for this phenomenon called chatoyancy. The incident light is reflected in such a way that that a bright strip of light appears running perpendicular to the inclusions.
With a hardness of 8.5 on Moh's scale, chrysoberyl is extremely hard and third only to corundum (9.0), and diamond (10) in hardness. Faceted chrysoberyl is a beautiful gem.