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Precious Opal
Precious Opal

Beryl
Beryl



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Precious Opal
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Beryl

Precious Opal and Beryl Optical Properties

Optical Properties

Luster

-
Vitreous, Resinous

Pleochroism

-
Weak to distinct

Dispersion

0.010.01
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent, Transparent to opaque

Refractive Index

1.370-1.4701.560-1.604
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Hexagonal

Birefringence

-99990.0040-0.0070
0 0.296
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Clarity

Transparent
Transparent

Precious Opal and Beryl Optic Character

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

Precious Opal and Beryl Transparency

Similar to their colors, Precious 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, Precious Opal is Transparent and Translucent while Precious Opal is Transparent and Translucent in appearance.