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