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Beryllonite
Beryllonite

Brucite
Brucite



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Beryllonite
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Brucite

Beryllonite and Brucite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Adamantine, Pearly
Vitreous, Pearly
1.2 Pleochroism
AbsentWalter Schumann
Not Available
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
TransparentMichael O’Donoghue, Gems, Sixth Edition (2006)
1.5 Refractive Index
1.552-1.5621.56-1.60
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
monoclinic
Trigonal
1.8 Birefringence
0.0090.010-0.020
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TransparentMichael O’Donoghue

Beryllonite and Brucite Optic Character

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

Similar to their colors, Beryllonite and Brucite 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.