Kyanite Cyprine and Tourmaline Optical Properties

Kyanite Cyprine

Tourmaline

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli

typically moderate to strong

1.3 Dispersion

0.020.02

0.007 1

1.4 Transparency

Transparent

Transparent, Translucent, Transparent to opaque

1.5 Refractive Index

1.710-1.7351.614-1.666

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Not Available

Trigonal

1.8 Birefringence

0.012-0.0330.014-0.040

0 0.296

1.9 Clarity

Transparent

Kyanite Cyprine and Tourmaline Optic Character

Kyanite Cyprine and Tourmaline optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Kyanite Cyprine and Tourmaline 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 Kyanite Cyprine and Tourmaline 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. Kyanite Cyprine has Biaxial/+ character.

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Kyanite Cyprine and Tourmaline Transparency

Similar to their colors, Kyanite Cyprine and Tourmaline 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, Kyanite Cyprine is Transparent while Kyanite Cyprine is Transparent in appearance.