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Beryllonite
Beryllonite

Friedelite
Friedelite



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Beryllonite
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Friedelite

Beryllonite and Friedelite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Adamantine, Pearly
Not Available
1.2 Pleochroism
AbsentWalter Schumann
NilArthur Thomas
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Translucent
1.5 Refractive Index
1.552-1.5621.627-1.663
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
1.8 Birefringence
0.0090.032-0.035
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Beryllonite and Friedelite Optic Character

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

Beryllonite and Friedelite Transparency

Similar to their colors, Beryllonite 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, Beryllonite is Gemmological Tables (2004) More from other references while Beryllonite is Gemmological Tables (2004) More from other references in appearance.