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Beryl
Beryl

Anthophyllite
Anthophyllite



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Beryl
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Anthophyllite

Beryl and Anthophyllite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous, Pearly

Pleochroism

Weak to distinct
-

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

Transparent, Transparent to opaque
Transparent

Refractive Index

1.560-1.6041.603-1.690
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

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

Birefringence

0.0040-0.0070-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent

Beryl and Anthophyllite Optic Character

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

Beryl and Anthophyllite Transparency

Similar to their colors, Beryl 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, Beryl is Transparent and Transparent to opaque while Beryl is Transparent and Transparent to opaque in appearance.