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Astrophyllite and Turquoise Optical Properties


Turquoise and Astrophyllite Optical Properties


Optical Properties

Luster
Greasy, Pearly   
Waxy   

Pleochroism
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow   
Weak   

Dispersion
Not Available   
None   

Transparency
Translucent   
Translucent, Opaque   

Refractive Index
1.678-1.758   
1.610-1.650   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
Triclinic   

Birefringence
0.050   
0.040   

Clarity
Translucent   
Translucent   

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Astrophyllite and Turquoise Optic Character

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

Similar to their colors, Astrophyllite and Turquoise 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, Astrophyllite is Translucent while Astrophyllite is Translucent in appearance.

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