Chlorapatite and Covellite Optical Properties

Chlorapatite

Covellite

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1 Optical Properties

1.1 Luster

Not Available

Resinous

1.2 Pleochroism

Weak to moderate; in pale colors.Anthony et al

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

1.665-1.6671.45-2.62

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Hexagonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

OpaqueAnthony et al

Chlorapatite and Covellite Optic Character

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

Chlorapatite Vs Chrysoberyl

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Chlorapatite and Covellite Transparency

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