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Apatite
Apatite

Phosgenite
Phosgenite



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Apatite
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Phosgenite

Apatite and Phosgenite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine

Pleochroism

Blue stones – strong
Weakly pleochroic with O reddish and E greenish in thick sections.

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.628-1.6512.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
tetragonal

Birefringence

0.002-0.0080.027
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Apatite and Phosgenite Optic Character

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

Similar to their colors, Apatite and Phosgenite 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.