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