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Chalcedony and Anorthoclase Optical Properties


Anorthoclase and Chalcedony Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Pearly   

Pleochroism
AbsentWalter Schumann   
WeakMichael O’Donoghue   

Dispersion
None   
Not Available   

Transparency
Translucent, Translucent to opaque   
Translucent   

Refractive Index
1.530-1.543   
1.518-1.534   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Triclinic Pinacoidal H-M Symbol ( 1) Space Group: C1   

Birefringence
0.003-0.009   
0.006-0.008   

Clarity
Translucent   
Translucent   

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Chalcedony and Anorthoclase Optic Character

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

Similar to their colors, Chalcedony and Anorthoclase 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, Chalcedony is Translucent and Translucent to opaque while Chalcedony is Translucent and Translucent to opaque in appearance.

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