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Orthoclase
Orthoclase

Anthophyllite
Anthophyllite



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Orthoclase
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Anthophyllite

Orthoclase and Anthophyllite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Pearly

Pleochroism

colorless.
-

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.518-1.5361.603-1.690
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

monoclinic
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma

Birefringence

0.0050-0.0060-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Orthoclase and Anthophyllite Optic Character

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

Orthoclase and Anthophyllite Transparency

Similar to their colors, Orthoclase 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, Orthoclase is while Orthoclase is in appearance.