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Apatite
Apatite

Boracite
Boracite



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Apatite
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Boracite

Apatite and Boracite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Adamantine

Pleochroism

Blue stones – strong
None

Dispersion

0.01-
0.005 1
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Transparency

-
Transparent

Refractive Index

1.628-1.6511.658-1.673
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Orthorhombic

Birefringence

0.002-0.0080.010-0.011
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Apatite and Boracite Optic Character

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

Similar to their colors, Apatite and Boracite 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.