Friedelite and Franklinite Optical Properties

Friedelite

Franklinite

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1 Optical Properties

1.1 Luster

Not Available

1.2 Pleochroism

NilArthur Thomas

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Translucent

1.5 Refractive Index

1.627-1.663Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m

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

1.8 Birefringence

0.032-0.035Not Available

0 0.296

1.9 Clarity

Translucent

Friedelite and Franklinite Optic Character

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

Similar to their colors, Friedelite 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, Friedelite is Translucent while Friedelite is Translucent in appearance.