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Forsterite and Fayalite Optical Properties


Fayalite and Forsterite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Resinous   

Pleochroism
colorless.   
Faint   

Dispersion
Not Available   
Not Available   

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

Refractive Index
1.635-1.671   
1.827-1.879   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Orthorhombic   

Birefringence
0.033-0.042   
0.042-0.051   

Clarity
Transparent   
TransparentAnthony et al   

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Forsterite and Fayalite Optic Character

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

Similar to their colors, Forsterite 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, Forsterite is Transparent while Forsterite is Transparent in appearance.

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