Sinhalite and Kyanite Cyprine Optical Properties

Sinhalite

Kyanite Cyprine

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

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

1.3 Dispersion

0.020.02

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Transparent

1.5 Refractive Index

1.665-1.7121.710-1.735

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.036-0.0420.012-0.033

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Sinhalite and Kyanite Cyprine Optic Character

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

Similar to their colors, Sinhalite and Kyanite Cyprine 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, Sinhalite is Gemmological Tables (2004) More from other references while Sinhalite is Gemmological Tables (2004) More from other references in appearance.