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Azurite
Azurite

Willemite
Willemite



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Azurite
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Willemite

Azurite and Willemite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Resinous

Pleochroism

Visible shades of blue
-

Dispersion

0.030.17
0.005 1
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Transparency

Transparent, Translucent
Transparent, Translucent

Refractive Index

1.720-1.8501.687-1.723
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.1080.028-0.030
0 0.296
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Clarity

Transparent
Transparent

Azurite and Willemite Optic Character

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

Azurite and Willemite Transparency

Similar to their colors, Azurite and Willemite 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, Azurite is Transparent and Translucent while Azurite is Transparent and Translucent in appearance.