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Sard and Agrellite Optical Properties


Agrellite and Sard Optical Properties


Optical Properties

Luster
Waxy   
Pearly   

Pleochroism
AbsentWalter Schumann   
colorless.   

Dispersion
None   
Not Available   

Transparency
Translucent   
Not Available   

Refractive Index
1.535-1.539   
1.567   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Triclinic   

Birefringence
0.008-0.010   
0.014   

Clarity
Translucent   
Not Available   

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Sard and Agrellite Optic Character

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

Similar to their colors, Sard and Agrellite 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, Sard is Translucent while Sard is Translucent in appearance.

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