Riebeckite and Franklinite Optical Properties

Riebeckite

Franklinite

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1 Optical Properties

1.1 Luster

Vitreous, Silky

Not Available

1.2 Pleochroism

X = blue

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Translucent

1.5 Refractive Index

1.680-1.698Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

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

1.8 Birefringence

0.005-0.008Not Available

0 0.296

1.9 Clarity

Not Available

Translucent

Riebeckite and Franklinite Optic Character

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

Similar to their colors, Riebeckite 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, Riebeckite is Not Available while Riebeckite is Not Available in appearance.