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Taaffeite
Taaffeite

Powellite
Powellite



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Taaffeite
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Powellite

Taaffeite and Powellite Optical Properties

Optical Properties

Luster

Vitreous
Greasy, Subadamantine

Pleochroism

Weak
In deeply colored specimens: blue greenAnthony et al

Dispersion

0.020.03
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.70-1.731.974-1.984
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
-

Birefringence

0.055-9999
0 0.296
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Clarity

-
Transparent

Taaffeite and Powellite Optic Character

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

Taaffeite and Powellite Transparency

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