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Common Opal
Common Opal

Beryl
Beryl



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Common Opal
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Beryl

Common Opal and Beryl Optical Properties

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Optical Properties

Luster

-
Vitreous, Resinous

Pleochroism

-
Weak to distinct

Dispersion

0.010.01
0.005 1
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Transparency

Translucent
Transparent, Transparent to opaque

Refractive Index

1.37-1.521.560-1.604
1 3.25
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Optic Character

-
-

Crystal System

-
Hexagonal

Birefringence

-99990.0040-0.0070
0 0.296
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Clarity

Translucent
Transparent

Common Opal and Beryl Optic Character

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

Common Opal and Beryl Transparency

Similar to their colors, Common Opal and Beryl 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, Common Opal is Translucent while Common Opal is Translucent in appearance.