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Calcite and Cordierite Optical Properties


Cordierite and Calcite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Greasy, Vitreous   

Pleochroism
NilArthur Thomas   
X = pale yellow   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Translucent   
Not Available   

Refractive Index
1.486-1.658   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
0.154-0.174   
Not Available   

Clarity
Transparent   
Not Available   

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Calcite and Cordierite Optic Character

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

Similar to their colors, Calcite and Cordierite 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, Calcite is Translucent and Transparent while Calcite is Translucent and Transparent in appearance.

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