Optical Properties of Gahnospinel 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. Gahnospinel optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification and evaluation.
Gahnospinel luster is the quantity of light the crystal reflects when light is incident on it. Gahnospinel which is commonly found in Blue color, is Gemmological Tables (2004) in nature. It possess Vitreous luster.