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Common Opal
Common Opal

Hiddenite
Hiddenite



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Common Opal
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Hiddenite

Common Opal and Hiddenite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous
1.2 Pleochroism
AbsentWalter Schumann
Distinct trichroism: yellow green green blue greenHerve Nicolas Lazzarelli
1.3 Dispersion
None0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Transparent
1.5 Refractive Index
1.37-1.521.657-1.681
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
monoclinic
1.8 Birefringence
Not Available0.014-0.016
Achroite
0 0.296
1.9 Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Common Opal and Hiddenite Optic Character

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

Common Opal and Hiddenite Transparency

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