Hibschite and Covellite Optical Properties

Hibschite

Covellite

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1 Optical Properties

1.1 Luster

Vitreous

Resinous

1.2 Pleochroism

Not Available

Marked

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Semitransparent

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

1.5 Refractive Index

Not Available1.45-2.62

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d

Hexagonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TranslucentAnthony et al

OpaqueAnthony et al

Hibschite and Covellite Optic Character

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

Similar to their colors, Hibschite 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, Hibschite is Semitransparent while Hibschite is Semitransparent in appearance.