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Umbalite and Axinite Optical Properties


Axinite and Umbalite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Not Available   
Strong   

Dispersion
0.02   
16
0.02   
21

Transparency
TransparentGemdat.org, Management Team (2012)   
Gemmological Tables (2004) More from other references   

Refractive Index
1.730-1.820   
1.656-1.704   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Not Available   
Triclinic   

Birefringence
Not Available   
0.009-0.012   

Clarity
TransparentGemdat.org   
TransparentUlrich Henn and Claudio C. Milisenda   

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Umbalite and Axinite Optic Character

Umbalite and Axinite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Umbalite and Axinite 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 Axinite 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. Axinite has Biaxial/+ character.

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Umbalite and Axinite Transparency

Similar to their colors, Umbalite and Axinite 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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