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Sinhalite
Sinhalite

Apatite
Apatite



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Sinhalite
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Apatite

Sinhalite and Apatite Optical Properties

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Optical Properties

Luster

-
Vitreous

Pleochroism

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli
Blue stones – strong

Dispersion

0.020.01
0.005 1
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Transparency

-
-

Refractive Index

1.665-1.7121.628-1.651
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
Hexagonal

Birefringence

0.036-0.0420.002-0.008
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda

Sinhalite and Apatite Optic Character

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

Sinhalite and Apatite Transparency

Similar to their colors, Sinhalite and Apatite 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, Sinhalite is while Sinhalite is in appearance.