Hibschite and Montebrasite Optical Properties

Hibschite

Montebrasite

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Semitransparent

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

1.5 Refractive Index

Not Available1.578-1.646

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d

Not Available

1.8 Birefringence

Not Available0.020-0.030

0 0.296

1.9 Clarity

TranslucentAnthony et al

TransparentWalter Schumann

Hibschite and Montebrasite Optic Character

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

Similar to their colors, Hibschite and Montebrasite 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, Hibschite is Semitransparent while Hibschite is Semitransparent in appearance.