Beryllonite and Boulder Opal Optical Properties

Beryllonite

Boulder Opal

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1 Optical Properties

1.1 Luster

Vitreous, Adamantine, Pearly

Not Available

1.2 Pleochroism

AbsentWalter Schumann

1.3 Dispersion

0.01None

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Transparent, Translucent

1.5 Refractive Index

1.552-1.5621.370-1.470

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

0.009Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Beryllonite and Boulder Opal Optic Character

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

Similar to their colors, Beryllonite and Boulder Opal 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.