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Erythrite
Erythrite

Beryllonite
Beryllonite



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Erythrite
X
Beryllonite

Erythrite and Beryllonite Optical Properties

Optical Properties

Luster

Subadamantine, Pearly
Vitreous, Adamantine, Pearly

Pleochroism

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red
-

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.626-1.6291.552-1.562
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
monoclinic

Birefringence

-99990.009
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Erythrite and Beryllonite Optic Character

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

Erythrite and Beryllonite Transparency

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