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Esperite and Fayalite Optical Properties


Fayalite and Esperite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Resinous   

Pleochroism
colorless.   
Faint   

Dispersion
Not Available   
Not Available   

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

Refractive Index
1.760-1.774   
1.827-1.879   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Orthorhombic   

Birefringence
0.012   
0.042-0.051   

Clarity
OpaqueAnthony et al   
TransparentAnthony et al   

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Esperite and Fayalite Optic Character

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

Similar to their colors, Esperite 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, Esperite is Opaque, OpaqueAnthony et al and Transparent while Esperite is Opaque, OpaqueAnthony et al and Transparent in appearance.

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