Spinel and Omphacite Optical Properties

Spinel

Omphacite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Absent

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

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.731.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

TranslucentAnthony et al

Spinel and Omphacite Optic Character

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

Similar to their colors, Spinel and Omphacite 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, Spinel is Translucent, Transparent and Transparent to translucent while Spinel is Translucent, Transparent and Transparent to translucent in appearance.