Musgravite and Hibonite Optical Properties

Musgravite

Hibonite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Not Available

O = brownish gray; E = gray

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

Handbook of mineralogy (2001)

1.5 Refractive Index

1.719-1.7391.79-1.807

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

Hexagonal

1.8 Birefringence

0.014-0.016Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Handbook of mineralogy (2001)

Musgravite and Hibonite Optic Character

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

Similar to their colors, Musgravite and Hibonite 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, Musgravite is Gemmological Tables (2004) while Musgravite is Gemmological Tables (2004) in appearance.