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Norbergite
Norbergite

Ludlamite
Ludlamite



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Norbergite
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Ludlamite

Norbergite and Ludlamite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Pearly

Pleochroism

Pale yellow very pale yellow colorlessAnthony et al
-

Dispersion

0.020.02
0.005 1
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Transparency

Transparent
-

Refractive Index

1.563-1.5931.653-1.693
1 3.25
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Optic Character

-
-

Crystal System

-
monoclinic

Birefringence

-99990.038-0.044
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Norbergite and Ludlamite Optic Character

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

Similar to their colors, Norbergite and Ludlamite 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.