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Sillimanite and Moss Agate Optical Properties


Moss Agate and Sillimanite Optical Properties


Optical Properties

Luster
Vitreous, Subadamantine, Silky   
Not Available   

Pleochroism
Colourless to pale brown to yellow   
AbsentWalter Schumann   

Dispersion
Not Available   
None   

Transparency
Transparent, Translucent   
TranslucentWalter Schumann, Gemstones of the world (2001)   

Refractive Index
1.653-1.685   
1.530-1.540   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Not Available   

Birefringence
0.020-0.022   
0.004   

Clarity
Transparent   
TranslucentWalter Schumann   

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Sillimanite and Moss Agate Optic Character

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

Similar to their colors, Sillimanite and Moss Agate 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, Sillimanite is Translucent and Transparent while Sillimanite is Translucent and Transparent in appearance.

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