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Thulite and Tourmaline Optical Properties


Tourmaline and Thulite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Present   
typically moderate to strong   

Dispersion
Not Available   
0.02   
22

Transparency
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.   
Transparent, Translucent, Transparent to opaque   

Refractive Index
1.695   
1.614-1.666   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Trigonal   

Birefringence
0.006-0.018   
0.014-0.040   

Clarity
OpaqueHerve Nicolas Lazzarelli   
Transparent   

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Thulite and Tourmaline Optic Character

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

Similar to their colors, Thulite 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, Thulite is Opaque, Opaque . May be translucent in thin backlit sections. and Translucent while Thulite is Opaque, Opaque . May be translucent in thin backlit sections. and Translucent in appearance.

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