Gahnospinel and Common Opal Optical Properties

Gahnospinel

Common Opal

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

AbsentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

Gemmological Tables (2004)

Translucent

1.5 Refractive Index

1.735-1.7901.37-1.52

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Translucent

Gahnospinel and Common Opal Optic Character

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

Similar to their colors, Gahnospinel 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, Gahnospinel is Gemmological Tables (2004) while Gahnospinel is Gemmological Tables (2004) in appearance.