Linarite and Covellite Optical Properties

Linarite

Covellite

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1 Optical Properties

1.1 Luster

Sub-Adamantine, Vitreous

Resinous

1.2 Pleochroism

X = pale blue; Y = blue; Z = Prussian blue

Marked

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

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

1.5 Refractive Index

1.809-1.8591.45-2.62

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Hexagonal

1.8 Birefringence

0.050Not Available

0 0.296

1.9 Clarity

Transparent

OpaqueAnthony et al

Linarite and Covellite Optic Character

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

Similar to their colors, Linarite 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, Linarite is Transparent while Linarite is Transparent in appearance.