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Bertrandite
Bertrandite

Verdite
Verdite



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Bertrandite
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Verdite

Bertrandite and Verdite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Silky

Pleochroism

none.
Extreme

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

TransparentAnthony et al
Translucent

Refractive Index

1.583-1.6141.580
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

TransparentAnthony et al
Translucent

Bertrandite and Verdite Optic Character

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

Bertrandite and Verdite Transparency

Similar to their colors, Bertrandite and Verdite 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, Bertrandite is TransparentAnthony et al while Bertrandite is TransparentAnthony et al in appearance.