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Norbergite
Norbergite

Sinhalite
Sinhalite



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Norbergite
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Sinhalite

Norbergite and Sinhalite Optical Properties

Optical Properties

Luster

Vitreous
-

Pleochroism

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

Dispersion

0.020.02
0.005 1
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Transparency

Transparent
-

Refractive Index

1.563-1.5931.665-1.712
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

-99990.036-0.042
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Norbergite and Sinhalite Optic Character

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

Norbergite and Sinhalite Transparency

Similar to their colors, Norbergite 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, Norbergite is Transparent while Norbergite is Transparent in appearance.