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Powellite and Topaz Optical Properties


Topaz and Powellite Optical Properties


Optical Properties

Luster
Greasy, Subadamantine   
Vitreous   

Pleochroism
In deeply colored specimens: blue greenAnthony et al   
Weak   

Dispersion
Not Available   
0.01   
26

Transparency
Transparent   
Transparent   

Refractive Index
1.974-1.984   
1.606-1.644   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Orthorhombic   

Birefringence
Not Available   
0.008-0.011   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Powellite and Topaz Optic Character

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

Similar to their colors, Powellite and Topaz 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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