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Gahnite and Franklinite Optical Properties


Franklinite and Gahnite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Translucent   

Refractive Index
1.790-1.818   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
cubic   
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m   

Birefringence
Not Available   
Not Available   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Translucent   

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Gahnite and Franklinite Optic Character

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

Similar to their colors, Gahnite and Franklinite 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, Gahnite is Gemmological Tables (2004) More from other references while Gahnite is Gemmological Tables (2004) More from other references in appearance.

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