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Crystal Opal and Foitite Optical Properties


Foitite and Crystal Opal Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
AbsentWalter Schumann   
Strong: pale lavender dark blueAnthony et al   

Dispersion
None   
Not Available   

Transparency
Transparent   
TranslucentAnthony et al, Translucent   

Refractive Index
1.370-1.   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m   

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
TranslucentAnthony et al   

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Crystal Opal and Foitite Optic Character

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

Similar to their colors, Crystal Opal 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, Crystal Opal is Transparent while Crystal Opal is Transparent in appearance.

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