Hypersthene and Franklinite Optical Properties

Hypersthene

Franklinite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Not Available

1.2 Pleochroism

Green stones strong: (dark) bluish-green brownish-red (yellowish)Herve Nicolas Lazzarelli

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

Translucent

1.5 Refractive Index

1.673-1.731Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m

1.8 Birefringence

0.016Not Available

0 0.296

1.9 Clarity

Transparent

Translucent

Hypersthene and Franklinite Optic Character

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

Similar to their colors, Hypersthene and Franklinite 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, Hypersthene is Translucent and Transparent while Hypersthene is Translucent and Transparent in appearance.