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Brookite
Brookite

Lazulite
Lazulite



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Brookite
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Lazulite

Brookite and Lazulite Optical Properties

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1 Optical Properties
1.1 Luster
Adamantine
Not Available
1.2 Pleochroism
Very weak
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
2.583-2.7411.604-1.646
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
monoclinic
1.8 Birefringence
0.1170.031-0.036
Achroite
0 0.296
1.9 Clarity
Gemmological Tables (2004) More from other references
Transparent

Brookite and Lazulite Optic Character

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

Brookite and Lazulite Transparency

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