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Iddingsite
Iddingsite

Foitite
Foitite



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Iddingsite
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Foitite

Iddingsite and Foitite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

-
Strong: pale lavender dark blueAnthony et al

Dispersion

-0.02
0.005 1
👆🏻

Transparency

-
TranslucentAnthony et al, Translucent

Refractive Index

-9999-9999
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

-
TranslucentAnthony et al

Iddingsite and Foitite Optic Character

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

Iddingsite and Foitite Transparency

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