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