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Liddicoatite
Liddicoatite

Andalusite
Andalusite



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Liddicoatite
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Andalusite

Liddicoatite and Andalusite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

Strong: dark brown light brownAnthony et al
strongly trichroic

Dispersion

0.010.02
0.005 1
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Transparency

Transparent
Transparent, Translucent

Refractive Index

-99991.627-1.650
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

-99990.009-0.010
0 0.296
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Clarity

Transparent
Transparent

Liddicoatite and Andalusite Optic Character

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

Liddicoatite and Andalusite Transparency

Similar to their colors, Liddicoatite and Andalusite 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, Liddicoatite is Transparent while Liddicoatite is Transparent in appearance.