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Lazulite
Lazulite

Mottramite
Mottramite



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Lazulite
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Mottramite

Lazulite and Mottramite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Greasy
1.2 Pleochroism
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Visible X=Y= canary yellow to greenish yellow
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.5 Transparency
Transparent, Translucent
Not Available
1.6 Refractive Index
1.604-1.6462.170
Agate Opal
1 3.25
1.7 Optic Character
Not Available
Not Available
1.8 Crystal System
monoclinic
Orthorhombic
1.9 Birefringence
0.031-0.0360.150
Achroite
0 0.296
1.10 Clarity
Transparent
Not Available

Lazulite and Mottramite Optic Character

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

Similar to their colors, Lazulite and Mottramite 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.