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Lazurite and Topaz Optical Properties


Topaz and Lazurite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Not Available   
Weak   

Dispersion
Not Available   
0.01   
26

Transparency
Gemmological Tables (2004) More from other references   
Transparent   

Refractive Index
1.500   
1.606-1.644   

Optic Character
Not Available   
Not Available   

Crystal System
Isometric   
Orthorhombic   

Birefringence
Not Available   
0.008-0.011   

Clarity
Gemmological Tables (2004) More from other references   
TransparentUlrich Henn and Claudio C. Milisenda   

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Lazurite and Topaz Optic Character

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

Similar to their colors, Lazurite 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, Lazurite is Gemmological Tables (2004) More from other references while Lazurite is Gemmological Tables (2004) More from other references in appearance.

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