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Apatite
Apatite

Linarite
Linarite



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Apatite
X
Linarite

Apatite and Linarite Optical Properties

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Optical Properties

Luster

Vitreous
Sub-Adamantine, Vitreous

Pleochroism

Blue stones – strong
X = pale blue; Y = blue; Z = Prussian blue

Dispersion

0.010.05
0.005 1
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Transparency

-
Transparent

Refractive Index

1.628-1.6511.809-1.859
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
monoclinic

Birefringence

0.002-0.0080.050
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Apatite and Linarite Optic Character

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

Similar to their colors, Apatite and Linarite 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.