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Kunzite
Kunzite

Bertrandite
Bertrandite



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Kunzite
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Bertrandite

Kunzite and Bertrandite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Strong trichroism: colorless pink violetHerve Nicolas Lazzarelli
none.

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

Transparent
TransparentAnthony et al

Refractive Index

1.657-1.6811.583-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.014-0.016-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentAnthony et al

Kunzite and Bertrandite Optic Character

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

Kunzite and Bertrandite Transparency

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