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Chlorapatite
Chlorapatite

Bertrandite
Bertrandite



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Chlorapatite
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Bertrandite

Chlorapatite and Bertrandite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

Weak to moderate; in pale colors.
none.

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

Transparent
TransparentAnthony et al

Refractive Index

1.665-1.6671.583-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Transparent
TransparentAnthony et al

Chlorapatite and Bertrandite Optic Character

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

Chlorapatite and Bertrandite Transparency

Similar to their colors, Chlorapatite and Bertrandite 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, Chlorapatite is Transparent while Chlorapatite is Transparent in appearance.