Erythrite and Dioptase Optical Properties

Erythrite

Dioptase

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1 Optical Properties

1.1 Luster

Subadamantine, Pearly

Vitreous

1.2 Pleochroism

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

Weak; dark emerald green

1.3 Dispersion

NA0.04

0.007 1

1.4 Transparency

Not Available

TranslucentHerve Nicolas Lazzarelli

1.5 Refractive Index

1.626-1.6291.644-1.720

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Trigonal

1.8 Birefringence

Not Available0.051-0.053

0 0.296

1.9 Clarity

Not Available

TranslucentHerve Nicolas Lazzarelli

Erythrite and Dioptase Optic Character

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

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Erythrite and Dioptase Transparency

Similar to their colors, Erythrite and Dioptase 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 Not Available while Erythrite is Not Available in appearance.