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Garnet and Mottramite Optical Properties


Mottramite and Garnet Optical Properties


Optical Properties

Luster
Vitreous, Adamantine, Vitreous, Adamantine   
Greasy   

Pleochroism
None   
Visible X=Y= canary yellow to greenish yellow   

Dispersion
0.02   
16
Not Available   

Transparency
Transparent, Transparent to translucent   
Not Available   

Refractive Index
1.730-1.895   
2.170   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
Not Available   
0.150   

Clarity
Transparent   
Not Available   

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Garnet and Mottramite Optic Character

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

Similar to their colors, Garnet and Mottramite 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, Garnet is Transparent and Transparent to translucent while Garnet is Transparent and Transparent to translucent in appearance.

Semi Precious

Semi Precious


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