Dioptase and Rosasite Optical Properties

Dioptase

Rosasite

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1 Optical Properties

1.1 Luster

Vitreous

Silky, Vitreous

1.2 Pleochroism

Weak; dark emerald green

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

1.3 Dispersion

0.04NA

0.007 1

1.4 Transparency

TranslucentHerve Nicolas Lazzarelli

Not Available

1.5 Refractive Index

1.644-1.7201.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

monoclinic

1.8 Birefringence

0.051-0.0530.139-0.143

0 0.296

1.9 Clarity

TranslucentHerve Nicolas Lazzarelli

Not Available

Dioptase and Rosasite Optic Character

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

Dioptase Vs Euclase

Dioptase Vs Faustite

Dioptase and Rosasite Transparency

Similar to their colors, Dioptase and Rosasite 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.