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Erythrite
Erythrite

Zoisite
Zoisite



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Erythrite
X
Zoisite

Erythrite and Zoisite Optical Properties

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Optical Properties

Luster

Subadamantine, Pearly
Vitreous

Pleochroism

Visible: X = pale pinkish to pale rose; Y = pale violet to pale violet-rose; Z = deep red
X = pale pink to red-violet; Y = nearly colorless to bright pink or deep blue; Z = pale yellow to yellow-green

Dispersion

0.030.02
0.005 1
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Transparency

-
Transparent, Translucent, Opaque . May be translucent in thin backlit sections.

Refractive Index

1.626-1.6291.685-1.707
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

-99990.006-0.018
0 0.296
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Clarity

-
Transparent

Erythrite and Zoisite Optic Character

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

Similar to their colors, Erythrite and Zoisite 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.