Omphacite and Phosphosiderite Optical Properties

Omphacite

Phosphosiderite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

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

Pale rose-red carmine-red colorlessAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TranslucentAnthony et al, Handbook of mineralogy (2001)

Transparent

1.5 Refractive Index

1.662-1.7231.692-1.739

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

Not Available0.240

0 0.296

1.9 Clarity

TranslucentAnthony et al

Transparent

Omphacite and Phosphosiderite Optic Character

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

Similar to their colors, Omphacite and Phosphosiderite 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.