Norbergite and Friedelite Optical Properties

Norbergite

Friedelite

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

Pale yellow very pale yellow colorlessAnthony et al

NilArthur Thomas

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

Translucent

1.5 Refractive Index

1.563-1.5931.627-1.663

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m

1.8 Birefringence

Not Available0.032-0.035

0 0.296

1.9 Clarity

Transparent

Translucent

Norbergite and Friedelite Optic Character

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

Similar to their colors, Norbergite and Friedelite 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.