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Beryllonite
Beryllonite

Anthophyllite
Anthophyllite



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Beryllonite
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Anthophyllite

Beryllonite and Anthophyllite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine, Pearly
Vitreous, Pearly

Pleochroism

-
-

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.552-1.5621.603-1.690
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

0.009-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Beryllonite and Anthophyllite Optic Character

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

Beryllonite and Anthophyllite Transparency

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