Sinhalite and Ekanite Optical Properties

Sinhalite

Ekanite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli

Not Available

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Transparent

1.5 Refractive Index

1.665-1.7121.593-1.596

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Tetragonal Trapezohedral H-M Symbol (4 2 2) Space Group: I 422

1.8 Birefringence

0.036-0.0420.001

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Sinhalite and Ekanite Optic Character

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

Similar to their colors, Sinhalite and Ekanite 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.