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Pezzottaite and Thulite Optical Properties


Thulite and Pezzottaite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Moderate dichroic   
Present   

Dispersion
Not Available   
Not Available   

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

Refractive Index
1.598-1.620   
1.695   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Orthorhombic   

Birefringence
0.008-0.011   
0.006-0.018   

Clarity
Transparent   
OpaqueHerve Nicolas Lazzarelli   

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Pezzottaite and Thulite Optic Character

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

Similar to their colors, Pezzottaite and Thulite 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, Pezzottaite is Transparent while Pezzottaite is Transparent in appearance.

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