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Turquoise

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Turquoise and Foitite Optical Properties

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1 Optical Properties
1.1 Luster
Waxy
Vitreous
1.2 Pleochroism
Weak
Strong: pale lavender dark blueAnthony et al
1.3 Dispersion
Albite Optical ..
None
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent, Opaque
TranslucentAnthony et al, Translucent
1.5 Refractive Index
1.610-1.650
Not Available
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Triclinic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
1.8 Birefringence
0.040
Not Available
1.9 Clarity
Translucent
TranslucentAnthony et al

Turquoise and Foitite Optic Character

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

Turquoise and Foitite Transparency

Similar to their colors, Turquoise 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, Turquoise is Opaque and Translucent while Turquoise is Opaque and Translucent in appearance.