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Pyrargyrite and Allanite Optical Properties


Allanite and Pyrargyrite Optical Properties


Optical Properties

Luster
Adamantine   
Not Available   

Pleochroism
Distinct   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
Not Available   

Refractive Index
2.881-3.084   
1   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.203   
0.013-0.036   

Clarity
Translucent   
Not Available   

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<< Physical Properties

Pyrargyrite and Allanite Optic Character

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

Similar to their colors, Pyrargyrite and Allanite 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, Pyrargyrite is Translucent while Pyrargyrite is Translucent in appearance.

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