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Sinhalite
Sinhalite

Norbergite
Norbergite



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Sinhalite
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Norbergite

Sinhalite and Norbergite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

Trichroism: green light brown dark brownHerve Nicolas Lazzarelli
Pale yellow very pale yellow colorlessAnthony et al

Dispersion

0.020.02
0.005 1
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Transparency

-
Transparent

Refractive Index

1.665-1.7121.563-1.593
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

0.036-0.042-9999
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Sinhalite and Norbergite Optic Character

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

Sinhalite and Norbergite Transparency

Similar to their colors, Sinhalite and Norbergite 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.