Precious Opal and Jet Optical Properties

Precious Opal

Jet

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1 Optical Properties

1.1 Luster

Not Available

Waxy

1.2 Pleochroism

AbsentWalter Schumann

1.3 Dispersion

NoneNone

0.007 1

1.4 Transparency

Transparent, Translucent

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.370-1.4701.640-1.680

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Amorphous

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Gemmological Tables (2004) More from other references

Precious Opal and Jet Optic Character

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

Compare Blue Gemstones

Precious Opal Vs Sapphire

Precious Opal Vs Sard

Precious Opal Vs Sardonyx

Precious Opal and Jet Transparency

Similar to their colors, Precious Opal and Jet 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 Translucent and Transparent while Precious Opal is Translucent and Transparent in appearance.