Poudretteite and Omphacite Optical Properties

Poudretteite

Omphacite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Colorless

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.511-1.5321.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

Not Available

1.8 Birefringence

0.021Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

TranslucentAnthony et al

Poudretteite and Omphacite Optic Character

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

Similar to their colors, Poudretteite 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, Poudretteite is Gemmological Tables (2004) More from other references while Poudretteite is Gemmological Tables (2004) More from other references in appearance.