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Anorthoclase
Anorthoclase

Anthophyllite
Anthophyllite



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Anorthoclase
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Anthophyllite

Anorthoclase and Anthophyllite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Pearly
1.2 Pleochroism
WeakMichael O’Donoghue
When Fe-rich
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Transparent
1.5 Refractive Index
1.518-1.5341.603-1.690
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Triclinic Pinacoidal H-M Symbol ( 1) Space Group: C1
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
1.8 Birefringence
0.006-0.008Not Available
Achroite
0 0.296
1.9 Clarity
Translucent
Transparent

Anorthoclase and Anthophyllite Optic Character

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

Anorthoclase and Anthophyllite Transparency

Similar to their colors, Anorthoclase and Anthophyllite 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, Anorthoclase is Translucent while Anorthoclase is Translucent in appearance.