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Thomsonite
Thomsonite

Sellaite
Sellaite



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Thomsonite
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Sellaite

Thomsonite and Sellaite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
NilArthur Thomas
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Transparent
1.5 Refractive Index
1.510-1.5501.378-1.390
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
tetragonal
1.8 Birefringence
0.015-0.0200.012
Achroite
0 0.296
1.9 Clarity
Translucent
Transparent

Thomsonite and Sellaite Optic Character

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

Similar to their colors, Thomsonite and Sellaite 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.