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Astrophyllite and Chrysocolla Optical Properties


Chrysocolla and Astrophyllite Optical Properties


Optical Properties

Luster
Greasy, Pearly   
Vitreous, Greasy   

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

Dispersion
Not Available   
None   

Transparency
Translucent   
Opaque   

Refractive Index
1.678-1.758   
1.460-1.570   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
monoclinic   

Birefringence
0.050   
0.023-0.050   

Clarity
Translucent   
Gemmological Tables (2004) More from other references   

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Astrophyllite and Chrysocolla Optic Character

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

Similar to their colors, Astrophyllite and Chrysocolla 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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