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Emerald and Apophyllite Optical Properties


Apophyllite and Emerald Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Pearly   

Pleochroism
Strong dichroism: yellow green Lazzarelli   
Dichroic (colorless)   

Dispersion
0.01   
26
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
Transparent, Translucent   

Refractive Index
1.565-1.602   
1.530-1.543   

Optic Character
Not Available   
Uniaxial/-   

Crystal System
Hexagonal   
tetragonal   

Birefringence
0.0040-0.0070   
0.000-0.003   

Clarity
Color grading system   
Transparent   

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Emerald and Apophyllite Optic Character

Emerald and Apophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Emerald and Apophyllite 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 Emerald and Apophyllite 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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Emerald and Apophyllite Transparency

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

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