Tourmaline Bi Color and Foitite Optical Properties

Tourmaline Bi Color

Foitite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Not Available

Strong: pale lavender dark blueAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TranslucentAnthony et al, Translucent

1.5 Refractive Index

1.61-1.66Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

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

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Not Available

TranslucentAnthony et al

Tourmaline Bi Color and Foitite Optic Character

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

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Tourmaline Bi Color and Foitite Transparency

Similar to their colors, Tourmaline Bi Color 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, Tourmaline Bi Color is Not Available while Tourmaline Bi Color is Not Available in appearance.