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Andradite and Fayalite Optical Properties


Fayalite and Andradite Optical Properties


Optical Properties

Luster
Adamantine, Resinous   
Vitreous, Resinous   

Pleochroism
Not Available   
Faint   

Dispersion
0.06   
7
Not Available   

Transparency
Transparent   
TransparentAnthony et al, Handbook of mineralogy (2001)   

Refractive Index
1.88-1.94   
1.827-1.879   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Orthorhombic   

Birefringence
0.057   
0.042-0.051   

Clarity
Transparent   
TransparentAnthony et al   

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Andradite and Fayalite Optic Character

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

Similar to their colors, Andradite and Fayalite 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, Andradite is Transparent while Andradite is Transparent in appearance.

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