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Apatite
Apatite

Chrysoberyl
Chrysoberyl



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Apatite
X
Chrysoberyl

Apatite and Chrysoberyl Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Blue stones – strong
X = red; Y = yellow-orange; Z = emerald-green

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

1.628-1.6511.746-1.763
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

Hexagonal
Orthorhombic

Birefringence

0.002-0.0080.007-0.013
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Apatite and Chrysoberyl Optic Character

Apatite and Chrysoberyl optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Apatite and Chrysoberyl 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 Chrysoberyl 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. Chrysoberyl has Biaxial/+ character.

Apatite and Chrysoberyl Transparency

Similar to their colors, Apatite and Chrysoberyl 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.