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Ruby
Ruby

Umbalite
Umbalite



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Umbalite

Ruby and Umbalite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Adamantine, Vitreous, Adamantine
Not Available
1.2 Pleochroism
Strong: purplish-red
Not Available
1.3 Dispersion
Albite Optical ..
0.02
Rank: 21 (Overall)
0.02
Rank: 16 (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent, Translucent, Transparent to opaque
TransparentGemdat.org, Management Team (2012)
1.5 Refractive Index
1.762-1.778
1.730-1.820
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Not Available
1.8 Birefringence
0.008
Not Available
1.9 Clarity
Transparent
TransparentGemdat.org

Ruby and Umbalite Optic Character

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

Ruby and Umbalite Transparency

Similar to their colors, Ruby 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, Ruby is Translucent, Transparent and Transparent to opaque while Ruby is Translucent, Transparent and Transparent to opaque in appearance.