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Unakite and Sapphire Optical Properties


Sapphire and Unakite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Adamantine, Vitreous, Adamantine   

Pleochroism
Not Available   
Strong   

Dispersion
Not Available   
0.02   
21

Transparency
Gemstones of the world (2001)   
Transparent, Translucent, Transparent to opaque   

Refractive Index
1.525   
1.762-1.788   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Trigonal   

Birefringence
Not Available   
0.008-0.009   

Clarity
Gemstones of the world (2001)   
Transparent   

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Unakite and Sapphire Optic Character

Unakite and Sapphire optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Unakite and Sapphire Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Unakite and Sapphire optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Unakite and Sapphire Transparency

Similar to their colors, Unakite and Sapphire transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Unakite is Gemstones of the world (2001) while Unakite is Gemstones of the world (2001) in appearance.

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