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Moonstone and Umbalite Optical Properties


Umbalite and Moonstone Optical Properties


Optical Properties

Luster
Pearly   
Not Available   

Pleochroism
AbsentWalter Schumann   
Not Available   

Dispersion
None   
0.02   
16

Transparency
Transparent, Transparent to translucent   
TransparentGemdat.org, Management Team (2012)   

Refractive Index
1.518-1.527   
1.730-1.820   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Not Available   

Birefringence
0.006-0.007   
Not Available   

Clarity
Transparent   
TransparentGemdat.org   

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Moonstone and Umbalite Optic Character

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

Similar to their colors, Moonstone and Umbalite 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, Moonstone is Transparent and Transparent to translucent while Moonstone is Transparent and Transparent to translucent in appearance.

Semi Precious

Semi Precious


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