Adularia and Common Opal Optical Properties

Adularia

Common Opal

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1 Optical Properties

1.1 Luster

Not Available

1.2 Pleochroism

Not Available

AbsentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

TransparentArthur Thomas, Gemstones (2009)

Translucent

1.5 Refractive Index

1.518-1.5361.37-1.52

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

0.005-0.008Not Available

0 0.296

1.9 Clarity

TransparentArthur Thomas

Translucent

Adularia and Common Opal Optic Character

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

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Adularia and Common Opal Transparency

Similar to their colors, Adularia and Common 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, Adularia is Gemstones (2009) and TransparentArthur Thomas while Adularia is Gemstones (2009) and TransparentArthur Thomas in appearance.