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Tanzanite and Herderite Optical Properties


Herderite and Tanzanite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Present   
Not Available   

Dispersion
0.03   
14
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
Transparent   

Refractive Index
1.685-1.707   
1.587-1.642   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Orthorhombic   
monoclinic   

Birefringence
0.006-0.018   
0.028-0.032   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Tanzanite and Herderite Optic Character

Tanzanite and Herderite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Tanzanite and Herderite 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 Tanzanite and Herderite 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. Herderite has Biaxial/+ character.

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Tanzanite and Herderite Transparency

Similar to their colors, Tanzanite and Herderite 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, Tanzanite is Translucent, Transparent and Transparent to translucent while Tanzanite is Translucent, Transparent and Transparent to translucent in appearance.

Semi Precious

Semi Precious


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