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Zinnwaldite and Opal Optical Properties


Opal and Zinnwaldite Optical Properties


Optical Properties

Luster
Pearly, Vitreous   
Vitreous, Pearly   

Pleochroism
Distinct   
None   

Dispersion
Not Available   
None   

Transparency
Not Available   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.565-1.625   
1.37-1.52   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Trigonal   

Birefringence
0.040-0.050   
Not Available   

Clarity
Not Available   
Transparent   

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<< Physical Properties

Zinnwaldite and Opal Optic Character

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

Similar to their colors, Zinnwaldite and Opal 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, Zinnwaldite is Not Available while Zinnwaldite is Not Available in appearance.

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Green Gemstones


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