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Larvikite
Larvikite

Foitite
Foitite



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Larvikite
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Foitite

Larvikite and Foitite Optical Properties

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Optical Properties

Luster

Pearly
Vitreous

Pleochroism

-
Strong: pale lavender dark blueAnthony et al

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
TranslucentAnthony et al, Translucent

Refractive Index

-9999-9999
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Transparent
TranslucentAnthony et al

Larvikite and Foitite Optic Character

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

Larvikite and Foitite Transparency

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