Andesine and Franklinite Optical Properties

Andesine

Franklinite

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

colorless.

Not Available

1.3 Dispersion

0.70NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Translucent

1.5 Refractive Index

1.543-1.564Not Available

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Triclinic

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

1.8 Birefringence

0.007-0.011Not Available

0 0.296

1.9 Clarity

Transparent

Translucent

Andesine and Franklinite Optic Character

Andesine and Franklinite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Andesine 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 Andesine 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. Andesine has Biaxial/+ character.

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Andesine and Franklinite Transparency

Similar to their colors, Andesine 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, Andesine is Translucent, Transparent and Transparent to translucent while Andesine is Translucent, Transparent and Transparent to translucent in appearance.