Beryl and Friedelite Optical Properties

Beryl

Friedelite

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1 Optical Properties

1.1 Luster

Vitreous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous, Vitreous, Resinous

Not Available

1.2 Pleochroism

Weak to distinct

NilArthur Thomas

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent, Transparent to opaque

Translucent

1.5 Refractive Index

1.560-1.6041.627-1.663

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

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

1.8 Birefringence

0.0040-0.00700.032-0.035

0 0.296

1.9 Clarity

Transparent

Translucent

Beryl and Friedelite Optic Character

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

Similar to their colors, Beryl 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, Beryl is Transparent and Transparent to opaque while Beryl is Transparent and Transparent to opaque in appearance.