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Anorthoclase and Beryllonite Optical Properties


Beryllonite and Anorthoclase Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous, Adamantine, Pearly   

Pleochroism
WeakMichael O’Donoghue   
AbsentWalter Schumann   

Dispersion
Not Available   
0.01   
29

Transparency
Translucent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.518-1.534   
1.552-1.562   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.006-0.008   
0.009   

Clarity
Translucent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Anorthoclase and Beryllonite Optic Character

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

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

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