Pearl and Sinhalite Optical Properties

Pearl

Sinhalite

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1 Optical Properties

1.1 Luster

Pearly

Not Available

1.2 Pleochroism

AbsentWalter Schumann

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

1.3 Dispersion

None0.02

0.007 1

1.4 Transparency

Translucent, Opaque

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.52-1.661.665-1.712

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

1.8 Birefringence

0.1560.036-0.042

0 0.296

1.9 Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Pearl and Sinhalite Optic Character

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

Similar to their colors, Pearl and Sinhalite 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, Pearl is Opaque and Translucent while Pearl is Opaque and Translucent in appearance.