Andesine and Foitite Optical Properties

Andesine

Foitite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

colorless.

Strong: pale lavender dark blueAnthony et al

1.3 Dispersion

0.70NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

TranslucentAnthony et al, 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

Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

1.8 Birefringence

0.007-0.011Not Available

0 0.296

1.9 Clarity

Transparent

TranslucentAnthony et al

Andesine and Foitite Optic Character

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

Similar to their colors, Andesine and Foitite 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.