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Peridot
Peridot

Afghanite
Afghanite



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Peridot
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Afghanite

Peridot and Afghanite Optical Properties

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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Greasy
Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
0.02
Transparent
1.64-1.69
-
Orthorhombic
0.036
Transparent
 
Vitreous
-
0.02
Transparent
1.523
-
Trigonal
0.006
Transparent

Peridot and Afghanite Optic Character

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

Peridot and Afghanite Transparency

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