Common Opal and Hureaulite Optical Properties

Common Opal

Hureaulite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous, Greasy

1.2 Pleochroism

AbsentWalter Schumann

Colorless yellow to pale rose reddish yellow to reddish brown.Anthony et al

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent

Transparent

1.5 Refractive Index

1.37-1.521.647-1.667

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

1.8 Birefringence

Not Available0.012

0 0.296

1.9 Clarity

Translucent

Transparent

Common Opal and Hureaulite Optic Character

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

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Common Opal Vs Dravite

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Common Opal Vs Dumortierite

Common Opal and Hureaulite Transparency

Similar to their colors, Common Opal and Hureaulite 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.