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Apatite
Apatite

Adularia
Adularia



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Apatite
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Adularia

Apatite and Adularia Optical Properties

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Optical Properties

Luster

Vitreous
-

Pleochroism

Blue stones – strong
-

Dispersion

0.010.01
0.005 1
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Transparency

-
TransparentArthur Thomas

Refractive Index

1.628-1.6511.518-1.536
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
-

Birefringence

0.002-0.0080.005-0.008
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentArthur Thomas

Apatite and Adularia Optic Character

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

Similar to their colors, Apatite and Adularia 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.