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Umbalite
Umbalite

Musgravite
Musgravite



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Umbalite
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Musgravite

Umbalite and Musgravite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
TransparentGemdat.org, Management Team (2012)
Gemmological Tables (2004)
1.5 Refractive Index
1.730-1.8201.719-1.739
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Trigonal
1.8 Birefringence
Not Available0.014-0.016
Achroite
0 0.296
1.9 Clarity
TransparentGemdat.org
TransparentUlrich Henn and Claudio C. Milisenda

Umbalite and Musgravite Optic Character

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

Umbalite and Musgravite Transparency

Similar to their colors, Umbalite and Musgravite 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.