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Umbalite and Fayalite Optical Properties


Fayalite and Umbalite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Resinous   

Pleochroism
Not Available   
Faint   

Dispersion
0.02   
16
Not Available   

Transparency
TransparentGemdat.org, Management Team (2012)   
TransparentAnthony et al, Handbook of mineralogy (2001)   

Refractive Index
1.730-1.820   
1.827-1.879   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Orthorhombic   

Birefringence
Not Available   
0.042-0.051   

Clarity
TransparentGemdat.org   
TransparentAnthony et al   

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Umbalite and Fayalite Optic Character

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

Similar to their colors, Umbalite 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, Umbalite is Management Team (2012) and TransparentGemdat.org while Umbalite is Management Team (2012) and TransparentGemdat.org in appearance.

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