Anorthoclase and Omphacite Optical Properties

Anorthoclase

Omphacite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous

1.2 Pleochroism

WeakMichael OâDonoghue

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.518-1.5341.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic Pinacoidal H-M Symbol ( 1) Space Group: C1

Not Available

1.8 Birefringence

0.006-0.008Not Available

0 0.296

1.9 Clarity

Translucent

TranslucentAnthony et al

Anorthoclase and Omphacite Optic Character

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

Similar to their colors, Anorthoclase 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, Anorthoclase is Translucent while Anorthoclase is Translucent in appearance.