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Tanzanite
Tanzanite

Peridot
Peridot



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Tanzanite
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Peridot

Tanzanite and Peridot Optical Properties

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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Present
0.03
Transparent, Translucent, Transparent to translucent
1.685-1.707
-
Orthorhombic
0.006-0.018
TransparentUlrich Henn and Claudio C. Milisenda
 
Vitreous, Greasy
Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
0.02
Transparent
1.64-1.69
-
Orthorhombic
0.036
Transparent

Tanzanite and Peridot Optic Character

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

Tanzanite and Peridot Transparency

Similar to their colors, Tanzanite and Peridot 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 while Tanzanite is in appearance.