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Hodgkinsonite
Hodgkinsonite

Foitite
Foitite



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Hodgkinsonite
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Foitite

Hodgkinsonite and Foitite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
-
0.02
-
1.720-1.746
-
monoclinic
0.026
-
 
Vitreous
Strong: pale lavender dark blueAnthony et al
0.02
TranslucentAnthony et al, Translucent
-9999
-
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
-9999
TranslucentAnthony et al

Hodgkinsonite and Foitite Optic Character

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

Hodgkinsonite and Foitite Transparency

Similar to their colors, Hodgkinsonite 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, Hodgkinsonite is while Hodgkinsonite is in appearance.