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Gahnite
Gahnite

Lazulite
Lazulite



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Gahnite
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Lazulite

Gahnite and Lazulite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Not Available
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
1.5 Refractive Index
1.790-1.8181.604-1.646
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
cubic
monoclinic
1.8 Birefringence
Not Available0.031-0.036
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Gahnite and Lazulite Optic Character

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

Gahnite and Lazulite Transparency

Similar to their colors, Gahnite 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, Gahnite is Gemmological Tables (2004) More from other references while Gahnite is Gemmological Tables (2004) More from other references in appearance.