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Antigorite
Antigorite

Fayalite
Fayalite



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Antigorite
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Fayalite

Antigorite and Fayalite Optical Properties

1 Optical Properties
1.1 Luster
Waxy, Silky, Resinous, Greasy
Vitreous, Resinous
1.2 Pleochroism
pale greenish yellow.
Faint
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
TransparentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.530-1.5751.827-1.879
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Monoclinic Domatic H-M Symbol (m) Space Group: Cm
Orthorhombic
1.8 Birefringence
Not Available0.042-0.051
Achroite
0 0.296
1.9 Clarity
Translucent
TransparentAnthony et al

Antigorite and Fayalite Optic Character

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

Antigorite and Fayalite Transparency

Similar to their colors, Antigorite 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, Antigorite is Translucent while Antigorite is Translucent in appearance.