Piemontite and Omphacite Optical Properties

Piemontite

Omphacite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

visible

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.725-1.7561.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

0.025-0.076Not Available

0 0.296

1.9 Clarity

Not Available

TranslucentAnthony et al

Piemontite and Omphacite Optic Character

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

Similar to their colors, Piemontite 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, Piemontite is Not Available while Piemontite is Not Available in appearance.