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Druzy
Druzy

Opal
Opal



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Druzy
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Opal

Druzy and Opal Optical Properties

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Optical Properties

Luster

-
Vitreous, Pearly

Pleochroism

-
None

Dispersion

0.010.01
0.005 1
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Transparency

Opaque
Transparent, Translucent, Transparent to translucent

Refractive Index

-99991.37-1.52
1 3.25
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Optic Character

-
-

Crystal System

Isometric
Trigonal

Birefringence

-9999-9999
0 0.296
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Clarity

Opaque
Transparent

Druzy and Opal Optic Character

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

Druzy and Opal Transparency

Similar to their colors, Druzy 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, Druzy is Opaque while Druzy is Opaque in appearance.