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Powellite and Jasper Optical Properties


Jasper and Powellite Optical Properties


Optical Properties

Luster
Greasy, Subadamantine  
Vitreous  

Pleochroism
In deeply colored specimens: blue greenAnthony et al  
-  

Dispersion
0.03  
99+
0.01  
99+

Transparency
Transparent  
Opaque  

Refractive Index
1.974-1.984  
1.540  

Optic Character
-  
-  

Crystal System
-  
Trigonal  

Birefringence
-9999  
-9999  

Clarity
Transparent  
OpaqueHerve Nicolas Lazzarelli  

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Powellite and Jasper Optic Character

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

Similar to their colors, Powellite and Jasper 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, Powellite is Transparent while Powellite is Transparent in appearance.

Blue Gemstones

Blue Gemstones


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