Andradite Garnet and Powellite Optical Properties

Andradite Garnet

Powellite

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1 Optical Properties

1.1 Luster

Adamantine

Greasy, Subadamantine

1.2 Pleochroism

Not Available

In deeply colored specimens: blue greenAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Opaque, Transparent to opaque

Transparent

1.5 Refractive Index

1.888-1.8891.974-1.984

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

Transparent

Andradite Garnet and Powellite Optic Character

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

Similar to their colors, Andradite Garnet and Powellite 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.