Labradorite and Umbalite Optical Properties

Labradorite

Umbalite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Not Available

1.2 Pleochroism

From the Congo

Not Available

1.3 Dispersion

Albite Optical ..

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0.01

Rank: 28 (Overall)▶

0.02

Rank: 16 (Overall)▶

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Fluorite Optical Properties

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0.044 (Anglesite Opt..)

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1.4 Transparency

Transparent, Translucent, Transparent to translucent

TransparentGemdat.org, Management Team (2012)

1.5 Refractive Index

1.554-1.573

1.730-1.820

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

Not Available

1.8 Birefringence

0.008-0.010

Not Available

1.9 Clarity

Transparent

TransparentGemdat.org

Labradorite and Umbalite Optic Character

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

Similar to their colors, Labradorite 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, Labradorite is Translucent, Transparent and Transparent to translucent while Labradorite is Translucent, Transparent and Transparent to translucent in appearance.

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