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Lazulite
Lazulite

Powellite
Powellite



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Lazulite
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Powellite

Lazulite and Powellite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Greasy, Subadamantine
1.2 Pleochroism
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
In deeply colored specimens: blue greenAnthony et al
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Transparent
1.5 Refractive Index
1.604-1.6461.974-1.984
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Not Available
1.8 Birefringence
0.031-0.036Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
Transparent

Lazulite and Powellite Optic Character

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

Lazulite and Powellite Transparency

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