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Beryllonite and Elbaite Optical Properties


Elbaite and Beryllonite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine, Pearly   
Vitreous   

Pleochroism
AbsentWalter Schumann   
Pale green   

Dispersion
0.01   
29
0.02   
22

Transparency
Gemmological Tables (2004) More from other references   
Transparent   

Refractive Index
1.552-1.562   
1.614-1.666   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Trigonal   

Birefringence
0.009   
0.014-0.032   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Beryllonite and Elbaite Optic Character

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

Similar to their colors, Beryllonite and Elbaite 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.

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