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Omphacite
Omphacite

Apatite
Apatite



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Omphacite
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Apatite

Omphacite and Apatite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak: colorless -- very pale green -- very pale green
Blue stones – strong

Dispersion

0.020.01
0.005 1
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Transparency

TranslucentAnthony et al
-

Refractive Index

1.662-1.7231.628-1.651
1 3.25
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Optic Character

-
-

Crystal System

-
Hexagonal

Birefringence

-99990.002-0.008
0 0.296
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Clarity

TranslucentAnthony et al
TransparentUlrich Henn and Claudio C. Milisenda

Omphacite and Apatite Optic Character

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

Omphacite and Apatite Transparency

Similar to their colors, Omphacite and Apatite 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, Omphacite is TranslucentAnthony et al while Omphacite is TranslucentAnthony et al in appearance.