Kyanite Cyprine and Covellite Optical Properties

Kyanite Cyprine

Covellite

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1 Optical Properties

1.1 Luster

Vitreous

Resinous

1.2 Pleochroism

Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli

Marked

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent

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

1.5 Refractive Index

1.710-1.7351.45-2.62

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Not Available

Hexagonal

1.8 Birefringence

0.012-0.033Not Available

0 0.296

1.9 Clarity

Transparent

OpaqueAnthony et al

Kyanite Cyprine and Covellite Optic Character

Kyanite Cyprine and Covellite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Kyanite Cyprine 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 Kyanite Cyprine 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. Kyanite Cyprine has Biaxial/+ character.

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Kyanite Cyprine and Covellite Transparency

Similar to their colors, Kyanite Cyprine 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, Kyanite Cyprine is Transparent while Kyanite Cyprine is Transparent in appearance.