Optical Properties of Sphalerite 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. Sphalerite optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Sphalerite luster is the quantity of light the crystal reflects when light is incident on it. Sphalerite which is commonly found in Green, Brown, Yellow, Red, Black color, is Translucent and Transparent in nature. It possess Adamantine luster.