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Apophyllite and Sapphire Optical Properties


Sapphire and Apophyllite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous, Adamantine, Vitreous, Adamantine   

Pleochroism
Dichroic (colorless)   
Strong   

Dispersion
Not Available   
0.02   
21

Transparency
Transparent, Translucent   
Transparent, Translucent, Transparent to opaque   

Refractive Index
1.530-1.543   
1.762-1.788   

Optic Character
Uniaxial/-   
Not Available   

Crystal System
tetragonal   
Trigonal   

Birefringence
0.000-0.003   
0.008-0.009   

Clarity
Transparent   
Transparent   

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Apophyllite and Sapphire Optic Character

Apophyllite and Sapphire optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Apophyllite 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 Apophyllite 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. Apophyllite has Uniaxial/- character.

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Apophyllite and Sapphire Transparency

Similar to their colors, Apophyllite 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, Apophyllite is Translucent and Transparent while Apophyllite is Translucent and Transparent in appearance.

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