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Pargasite
Pargasite

Omphacite
Omphacite



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Pargasite
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Omphacite

Pargasite and Omphacite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

-
Weak: colorless -- very pale green -- very pale green

Dispersion

0.020.02
0.005 1
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Transparency

Transparent
TranslucentAnthony et al

Refractive Index

1.613-1.6631.662-1.723
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
-

Birefringence

0.020-9999
0 0.296
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Clarity

Transparent
TranslucentAnthony et al

Pargasite and Omphacite Optic Character

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

Pargasite and Omphacite Transparency

Similar to their colors, Pargasite and Omphacite 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, Pargasite is Transparent while Pargasite is Transparent in appearance.