Omphacite and Jet Optical Properties

Omphacite

Jet

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1 Optical Properties

1.1 Luster

Vitreous

Waxy

1.2 Pleochroism

Weak: colorless -- very pale green -- very pale green

AbsentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

TranslucentAnthony et al, Handbook of mineralogy (2001)

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.662-1.7231.640-1.680

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Amorphous

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TranslucentAnthony et al

Gemmological Tables (2004) More from other references

Omphacite and Jet Optic Character

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

Similar to their colors, Omphacite and Jet 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, Omphacite is Handbook of mineralogy (2001) and TranslucentAnthony et al while Omphacite is Handbook of mineralogy (2001) and TranslucentAnthony et al in appearance.