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Sunstone and Anthophyllite Optical Properties


Anthophyllite and Sunstone Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Pearly   

Pleochroism
Weak or absentWalter Schumann   
When Fe-rich   

Dispersion
None   
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
Transparent   

Refractive Index
1.53-1.55   
1.603-1.690   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Triclinic   
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma   

Birefringence
0.007-0.010   
Not Available   

Clarity
Transparent to translucent   
Transparent   

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Sunstone and Anthophyllite Optic Character

Sunstone and Anthophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sunstone and Anthophyllite 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 Sunstone and Anthophyllite 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. Anthophyllite has Biaxial/+ character.

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Sunstone and Anthophyllite Transparency

Similar to their colors, Sunstone and Anthophyllite 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, Sunstone is Translucent, Transparent and Transparent to translucent while Sunstone is Translucent, Transparent and Transparent to translucent in appearance.

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