Andradite Garnet and Umbalite Optical Properties

Andradite Garnet

Umbalite

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1 Optical Properties

1.1 Luster

Adamantine

Not Available

1.2 Pleochroism

Not Available

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Transparent, Opaque, Transparent to opaque

TransparentGemdat.org, Management Team (2012)

1.5 Refractive Index

1.888-1.8891.730-1.820

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent to opaque

TransparentGemdat.org

Andradite Garnet and Umbalite Optic Character

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

Similar to their colors, Andradite Garnet 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, Andradite Garnet is Opaque, Transparent and Transparent to opaque while Andradite Garnet is Opaque, Transparent and Transparent to opaque in appearance.