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Apatite
Apatite

Garnet
Garnet



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Apatite
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Garnet

Apatite and Garnet Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Adamantine

Pleochroism

Blue stones – strong
None

Dispersion

0.010.02
0.005 1
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Transparency

-
Transparent, Transparent to translucent

Refractive Index

1.628-1.6511.730-1.895
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Trigonal

Birefringence

0.002-0.008-9999
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Apatite and Garnet Optic Character

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

Similar to their colors, Apatite and Garnet 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.