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Agate and Sellaite Optical Properties


Sellaite and Agate Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Absent   
Not Available   

Dispersion
None   
Not Available   

Transparency
Translucent   
Transparent   

Refractive Index
1.530-1.543   
1.378-1.390   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
tetragonal   

Birefringence
0.004   
0.012   

Clarity
Translucent   
Transparent   

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Agate and Sellaite Optic Character

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

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Agate and Sellaite Transparency

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

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