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Wulfenite
Wulfenite

Bertrandite
Bertrandite



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Wulfenite
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Bertrandite

Wulfenite and Bertrandite Optical Properties

Optical Properties

Luster

Adamantine, Resinous
Vitreous

Pleochroism

Weak
none.

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

Transparent
TransparentAnthony et al

Refractive Index

2.280-2.4051.583-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.122-9999
0 0.296
👆🏻

Clarity

Transparent
TransparentAnthony et al

Wulfenite and Bertrandite Optic Character

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

Wulfenite and Bertrandite Transparency

Similar to their colors, Wulfenite 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, Wulfenite is Transparent while Wulfenite is Transparent in appearance.