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Cassiterite and Lawsonite Optical Properties


Lawsonite and Cassiterite Optical Properties


Optical Properties

Luster
Adamantine, Greasy   
Vitreous, Greasy   

Pleochroism
Pleochroic haloes have been observed. Dichroic in yellow   
Weak   

Dispersion
0.07   
6
Not Available   

Transparency
Transparent, Translucent   
Not Available   

Refractive Index
1.990-2.105   
1.672-1.676   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
Orthorhombic   

Birefringence
0.096-0.098   
0.019-0.021   

Clarity
Transparent   
Not Available   

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Cassiterite and Lawsonite Optic Character

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

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Cassiterite and Lawsonite Transparency

Similar to their colors, Cassiterite and Lawsonite 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, Cassiterite is Translucent and Transparent while Cassiterite is Translucent and Transparent in appearance.

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