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Precious Opal
Precious Opal

Hiddenite
Hiddenite



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Precious Opal
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Hiddenite

Precious Opal and Hiddenite Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
Distinct trichroism: yellow green green blue greenHerve Nicolas Lazzarelli

Dispersion

0.010.02
0.005 1
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Transparency

Transparent, Translucent
Transparent

Refractive Index

1.370-1.4701.657-1.681
1 3.25
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Optic Character

-
-

Crystal System

-
monoclinic

Birefringence

-99990.014-0.016
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Precious Opal and Hiddenite Optic Character

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

Similar to their colors, Precious Opal and Hiddenite 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.