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Apophyllite and Grossular Optical Properties


Grossular and Apophyllite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Greasy, Vitreous   

Pleochroism
Dichroic (colorless)   
None   

Dispersion
Not Available   
0.02   
18

Transparency
Transparent, Translucent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.530-1.543   
1.730-1.760   

Optic Character
Uniaxial/-   
Not Available   

Crystal System
tetragonal   
cubic   

Birefringence
0.000-0.003   
0.020   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Apophyllite and Grossular Optic Character

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

Similar to their colors, Apophyllite and Grossular 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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