Montebrasite and Omphacite Optical Properties

Montebrasite

Omphacite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TransparentWalter Schumann, Gemstones of the world (2001) More from other references

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.578-1.6461.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

0.020-0.030Not Available

0 0.296

1.9 Clarity

TransparentWalter Schumann

TranslucentAnthony et al

Montebrasite and Omphacite Optic Character

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

Similar to their colors, Montebrasite 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, Montebrasite is Gemstones of the world (2001) More from other references and TransparentWalter Schumann while Montebrasite is Gemstones of the world (2001) More from other references and TransparentWalter Schumann in appearance.