Transvaal Jade and Covellite Optical Properties

Transvaal Jade

Covellite

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1 Optical Properties

1.1 Luster

Not Available

Resinous

1.2 Pleochroism

Not Available

Marked

1.3 Dispersion

0.03NA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

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

Not Available

Hexagonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

OpaqueAnthony et al

Transvaal Jade and Covellite Optic Character

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

Similar to their colors, Transvaal Jade 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, Transvaal Jade is Gemmological Tables (2004) while Transvaal Jade is Gemmological Tables (2004) in appearance.