Kyanite Cyprine and Dumortierite Optical Properties

Kyanite Cyprine

Dumortierite

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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

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

1.3 Dispersion

0.02None

0.007 1

1.4 Transparency

Transparent

Translucent, Translucent to opaque

1.5 Refractive Index

1.710-1.7351.669-1.723

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

0.012-0.0330.011-0.037

0 0.296

1.9 Clarity

Transparent

Translucent

Kyanite Cyprine and Dumortierite Optic Character

Kyanite Cyprine and Dumortierite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Kyanite Cyprine and Dumortierite 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 Dumortierite 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 Dumortierite Transparency

Similar to their colors, Kyanite Cyprine and Dumortierite 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.