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Beudantite
Beudantite

Bertrandite
Bertrandite



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Beudantite
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Bertrandite

Beudantite and Bertrandite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

visible
none.

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

-
TransparentAnthony et al

Refractive Index

1.9571.583-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.014-9999
0 0.296
👆🏻

Clarity

-
TransparentAnthony et al

Beudantite and Bertrandite Optic Character

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

Beudantite and Bertrandite Transparency

Similar to their colors, Beudantite 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, Beudantite is while Beudantite is in appearance.