Lazulite and Zoisite Optical Properties

Lazulite

Zoisite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli

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

1.3 Dispersion

0.010.02

0.007 1

1.4 Transparency

Transparent, Translucent

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

1.5 Refractive Index

1.604-1.6461.685-1.707

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Orthorhombic

1.8 Birefringence

0.031-0.0360.006-0.018

0 0.296

1.9 Clarity

Transparent

Lazulite and Zoisite Optic Character

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

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Lazulite and Zoisite Transparency

Similar to their colors, Lazulite 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, Lazulite is Translucent and Transparent while Lazulite is Translucent and Transparent in appearance.