Dioptase and Erythrite Optical Properties

Dioptase

Erythrite

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1 Optical Properties

1.1 Luster

Vitreous

Subadamantine, Pearly

1.2 Pleochroism

Weak; dark emerald green

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

1.3 Dispersion

0.04NA

0.007 1

1.4 Transparency

TranslucentHerve Nicolas Lazzarelli

Not Available

1.5 Refractive Index

1.644-1.7201.626-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

monoclinic

1.8 Birefringence

0.051-0.053Not Available

0 0.296

1.9 Clarity

TranslucentHerve Nicolas Lazzarelli

Not Available

Dioptase and Erythrite Optic Character

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

Compare Green Gemstones

Dioptase Vs Euclase

Dioptase Vs Faustite

Dioptase Vs Feldspar

Dioptase and Erythrite Transparency

Similar to their colors, Dioptase and Erythrite 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, Dioptase is TranslucentHerve Nicolas Lazzarelli while Dioptase is TranslucentHerve Nicolas Lazzarelli in appearance.