Andradite Garnet and Covellite Optical Properties

Andradite Garnet

Covellite

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1 Optical Properties

1.1 Luster

Adamantine

Resinous

1.2 Pleochroism

Not Available

Marked

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Opaque, Transparent to opaque

OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references

1.5 Refractive Index

1.888-1.8891.45-2.62

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Hexagonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent to opaque

OpaqueAnthony et al

Andradite Garnet and Covellite Optic Character

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

Similar to their colors, Andradite Garnet and Covellite 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.