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Apatite
Apatite

Vesuvianite
Vesuvianite



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Apatite
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Vesuvianite

Apatite and Vesuvianite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Resinous

Pleochroism

Blue stones – strong
slight in colored varieties

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.628-1.6511.703-1.752
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
tetragonal

Birefringence

0.002-0.0080.004-0.006
0 0.296
👆🏻

Clarity

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

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

Similar to their colors, Apatite and Vesuvianite 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.