Cat s Eye and Lapis lazuli Optical Properties

Cat s Eye

Lapis lazuli

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Greasy

1.2 Pleochroism

Not Available

AbsentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

Translucent

Opaque

1.5 Refractive Index

1.744-1.7551.500-1.670

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Translucent

Gemstones of the world (2001)

Cat s Eye and Lapis lazuli Optic Character

Cat s Eye and Lapis lazuli optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Cat s Eye and Lapis lazuli 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 Cat s Eye and Lapis lazuli 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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Cat s Eye and Lapis lazuli Transparency

Similar to their colors, Cat s Eye and Lapis lazuli 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, Cat s Eye is Translucent while Cat s Eye is Translucent in appearance.