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Topaz and Eosphorite Optical Properties


Eosphorite and Topaz Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Resinous   

Pleochroism
Weak   
Visible: X = yellow; Y = pink; Z = pale pink to colorless   

Dispersion
0.01   
26
Not Available   

Transparency
Transparent   
Transparent   

Refractive Index
1.606-1.644   
1.639-1.672   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Orthorhombic   

Birefringence
0.008-0.011   
0.029-0.032   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Topaz and Eosphorite Optic Character

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

Similar to their colors, Topaz and Eosphorite 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, Topaz is Transparent while Topaz is Transparent in appearance.

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