Covellite and Clinochlore Optical Properties

Covellite

Clinochlore

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1 Optical Properties

1.1 Luster

Resinous

Pearly, Greasy

1.2 Pleochroism

Marked

Distinct: light yellow-green to light bluE

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

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

Transparent

1.5 Refractive Index

1.45-2.621.571-1.597

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Hexagonal

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

OpaqueAnthony et al

Transparent

Covellite and Clinochlore Optic Character

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

Compare Blue Gemstones

Covellite Vs Falcons Eye

Covellite Vs Elbaite

Covellite Vs Fluorapatite

Covellite and Clinochlore Transparency

Similar to their colors, Covellite and Clinochlore 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, Covellite is Handbook of mineralogy (2001) More from other references and OpaqueAnthony et al while Covellite is Handbook of mineralogy (2001) More from other references and OpaqueAnthony et al in appearance.