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Zinnwaldite and Tourmaline Optical Properties


Tourmaline and Zinnwaldite Optical Properties


Optical Properties

Luster
Pearly, Vitreous   
Vitreous   

Pleochroism
Distinct   
typically moderate to strong   

Dispersion
Not Available   
0.02   
22

Transparency
Not Available   
Transparent, Translucent, Transparent to opaque   

Refractive Index
1.565-1.625   
1.614-1.666   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Trigonal   

Birefringence
0.040-0.050   
0.014-0.040   

Clarity
Not Available   
Transparent   

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Zinnwaldite and Tourmaline Optic Character

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

Similar to their colors, Zinnwaldite and Tourmaline 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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