Optical Properties of Pearl are its behavioral responses towards light. While few optical properties can be identified with naked eyes, other require special instruments by the gemologists to identify them. Pearl optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Pearl luster is the quantity of light the crystal reflects when light is incident on it. Pearl which is commonly found in Green, Blue color, is Opaque and Translucent in nature. It possess Pearly luster.