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Apophyllite
Apophyllite

Foitite
Foitite



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Apophyllite
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Foitite

Apophyllite and Foitite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous
1.2 Pleochroism
Dichroic (colorless)
Strong: pale lavender dark blueAnthony et al
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
TranslucentAnthony et al, Translucent
1.5 Refractive Index
1.530-1.543Not Available
Agate Opal
1 3.25
1.6 Optic Character
Uniaxial/-
Not Available
1.7 Crystal System
tetragonal
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
1.8 Birefringence
0.000-0.003Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
TranslucentAnthony et al

Apophyllite and Foitite Optic Character

Apophyllite and Foitite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Apophyllite 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 Apophyllite 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. Apophyllite has Uniaxial/- character.

Apophyllite and Foitite Transparency

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