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Prasiolite and Lazulite Optical Properties


Lazulite and Prasiolite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Very weak: light green pale greenWalter Schumann   
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli   

Dispersion
0.01   
27
0.01   
26

Transparency
Transparent, Translucent   
Transparent, Translucent   

Refractive Index
1.544-1.553   
1.604-1.646   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
monoclinic   

Birefringence
0.009   
0.031-0.036   

Clarity
Transparent   
Transparent   

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Prasiolite and Lazulite Optic Character

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

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Prasiolite and Lazulite Transparency

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

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