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Anthophyllite
Anthophyllite

Crocoite
Crocoite



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Anthophyllite
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Crocoite

Anthophyllite and Crocoite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Adamantine

Pleochroism

-
Distinctly trichroic

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent
Transparent

Refractive Index

1.603-1.6902.31-2.66
1 3.25
👆🏻

Optic Character

Biaxial/+
-

Crystal System

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent

Anthophyllite and Crocoite Optic Character

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

Similar to their colors, Anthophyllite and Crocoite 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.