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Apatite
Apatite

Cavansite
Cavansite



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Apatite
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Cavansite

Apatite and Cavansite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Pearly

Pleochroism

Blue stones – strong
Visible: X=Z= colorless Y= blue

Dispersion

0.010.04
0.005 1
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Transparency

-
-

Refractive Index

1.628-1.6511.542
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Orthorhombic

Birefringence

0.002-0.0080.009
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Apatite and Cavansite Optic Character

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

Apatite and Cavansite Transparency

Similar to their colors, Apatite and Cavansite 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, Apatite is while Apatite is in appearance.