Dioptase and Omphacite Optical Properties

Dioptase

Omphacite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak; dark emerald green

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

1.3 Dispersion

0.04NA

0.007 1

1.4 Transparency

TranslucentHerve Nicolas Lazzarelli

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.644-1.7201.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Not Available

1.8 Birefringence

0.051-0.053Not Available

0 0.296

1.9 Clarity

TranslucentHerve Nicolas Lazzarelli

TranslucentAnthony et al

Dioptase and Omphacite Optic Character

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

Similar to their colors, Dioptase 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, Dioptase is TranslucentHerve Nicolas Lazzarelli while Dioptase is TranslucentHerve Nicolas Lazzarelli in appearance.