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Tanzanite and Unakite Optical Properties


Unakite and Tanzanite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Present   
Not Available   

Dispersion
0.03   
14
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
Gemstones of the world (2001)   

Refractive Index
1.685-1.707   
1.525   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
monoclinic   

Birefringence
0.006-0.018   
Not Available   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Gemstones of the world (2001)   

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Tanzanite and Unakite Optic Character

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

Similar to their colors, Tanzanite and Unakite 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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