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Apatite
Apatite

Mimetite
Mimetite



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Apatite
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Mimetite

Apatite and Mimetite Optical Properties

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Optical Properties

Luster

Vitreous
Resinous, Subadamantine

Pleochroism

Blue stones – strong
Weak

Dispersion

0.010.04
0.005 1
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Transparency

-
Translucent

Refractive Index

1.628-1.6512.106-2.263
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Hexagonal

Birefringence

0.002-0.0080.019
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Apatite and Mimetite Optic Character

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

Similar to their colors, Apatite and Mimetite 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.