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Anthophyllite
Anthophyllite

Fayalite
Fayalite



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Anthophyllite
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Fayalite

Anthophyllite and Fayalite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Resinous
1.2 Pleochroism
When Fe-rich
Faint
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.603-1.6901.827-1.879
Agate Opal
1 3.25
1.6 Optic Character
Biaxial/+
Not Available
1.7 Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Orthorhombic
1.8 Birefringence
Not Available0.042-0.051
Achroite
0 0.296
1.9 Clarity
Transparent
TransparentAnthony et al

Anthophyllite and Fayalite Optic Character

Anthophyllite and Fayalite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Anthophyllite and Fayalite 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 Anthophyllite and Fayalite 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. Anthophyllite has Biaxial/+ character.

Anthophyllite and Fayalite Transparency

Similar to their colors, Anthophyllite and Fayalite 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, Anthophyllite is Transparent while Anthophyllite is Transparent in appearance.