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Apatite
Apatite

Scheelite
Scheelite



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Apatite
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Scheelite

Apatite and Scheelite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Adamantine

Pleochroism

Blue stones – strong
Definite dichoric in yellow (yellow to orange-brown)

Dispersion

0.010.04
0.005 1
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Transparency

-
Translucent, Transparent

Refractive Index

1.628-1.6511.918-1.936
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
tetragonal

Birefringence

0.002-0.0080.016
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Apatite and Scheelite Optic Character

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

Similar to their colors, Apatite and Scheelite 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.