Prasiolite and Omphacite Optical Properties

Prasiolite

Omphacite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Very weak: light green pale greenWalter Schumann

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

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent, Translucent

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.544-1.5531.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Not Available

1.8 Birefringence

0.009Not Available

0 0.296

1.9 Clarity

Transparent

TranslucentAnthony et al

Prasiolite and Omphacite Optic Character

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

Similar to their colors, Prasiolite 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, Prasiolite is Translucent and Transparent while Prasiolite is Translucent and Transparent in appearance.