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Goethite
Goethite

Lazulite
Lazulite



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Goethite
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Lazulite

Goethite and Lazulite Optical Properties

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Optical Properties

Luster

Adamantine
-

Pleochroism

VisibleArthur Thomas
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli

Dispersion

0.050.01
0.005 1
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Transparency

-
Transparent, Translucent

Refractive Index

2.26-2.3981.604-1.646
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
monoclinic

Birefringence

0.1380.031-0.036
0 0.296
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Clarity

-
Transparent

Goethite and Lazulite Optic Character

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

Goethite and Lazulite Transparency

Similar to their colors, Goethite 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, Goethite is while Goethite is in appearance.