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Povondraite
Povondraite

Opal
Opal



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Povondraite
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Opal

Povondraite and Opal Optical Properties

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Optical Properties

Luster

Resinous
Vitreous, Pearly

Pleochroism

Strong: yellow-brown
None

Dispersion

0.020.01
0.005 1
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Transparency

Translucent
Transparent, Translucent, Transparent to translucent

Refractive Index

-99991.37-1.52
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

-9999-9999
0 0.296
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Clarity

Translucent
Transparent

Povondraite and Opal Optic Character

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

Povondraite and Opal Transparency

Similar to their colors, Povondraite and 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, Povondraite is Translucent while Povondraite is Translucent in appearance.