Sinhalite and Sunstone Optical Properties

Sinhalite

Sunstone

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Optical Properties

Luster

Vitreous

Pleochroism

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

Weak or absentWalter Schumann

Dispersion

0.020.01

0.005 1

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Transparency

Transparent, Translucent, Transparent to translucent

Refractive Index

1.665-1.7121.53-1.55

1 3.25

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Optic Character

Crystal System

Orthorhombic

Triclinic

Birefringence

0.036-0.0420.007-0.010

0 0.296

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Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent to translucent

Sinhalite and Sunstone Optic Character

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

Similar to their colors, Sinhalite and Sunstone 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 while Sinhalite is in appearance.