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Thomsonite
Thomsonite

Andalusite
Andalusite



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Thomsonite
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Andalusite

Thomsonite and Andalusite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Greasy
1.2 Pleochroism
NilArthur Thomas
strongly trichroic
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.5 Transparency
Translucent
Transparent, Translucent
1.6 Refractive Index
1.510-1.5501.627-1.650
Agate Opal
1 3.25
1.7 Optic Character
Not Available
Not Available
1.8 Crystal System
Orthorhombic
Orthorhombic
1.9 Birefringence
0.015-0.0200.009-0.010
Achroite
0 0.296
1.10 Clarity
Translucent
Transparent

Thomsonite and Andalusite Optic Character

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

Thomsonite and Andalusite Transparency

Similar to their colors, Thomsonite 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, Thomsonite is Translucent while Thomsonite is Translucent in appearance.