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Bertrandite
Bertrandite

Edenite
Edenite



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Bertrandite
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Edenite

Bertrandite and Edenite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

none.
Distinct

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

TransparentAnthony et al
-

Refractive Index

1.583-1.6141.606-1.649
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

TransparentAnthony et al
-

Bertrandite and Edenite Optic Character

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

Similar to their colors, Bertrandite and Edenite 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.