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Colemanite
Colemanite

Taaffeite
Taaffeite



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Colemanite
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Taaffeite

Colemanite and Taaffeite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

-
Weak

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.584-1.6151.70-1.73
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
Hexagonal

Birefringence

0.028-0.0300.055
0 0.296
👆🏻

Clarity

Transparent
-

Colemanite and Taaffeite Optic Character

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

Colemanite and Taaffeite Transparency

Similar to their colors, Colemanite and Taaffeite 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, Colemanite is Transparent while Colemanite is Transparent in appearance.