Opal and Tigers Eye Optical Properties

Opal

Tigers Eye

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Silky

1.2 Pleochroism

None

Not Available

1.3 Dispersion

NoneNone

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Opaque

1.5 Refractive Index

1.37-1.521.534-1.540

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

Gemstones of the world (2001) More from other references

Opal and Tigers Eye Optic Character

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

Similar to their colors, Opal and Tigers Eye 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, Opal is Translucent, Transparent and Transparent to translucent while Opal is Translucent, Transparent and Transparent to translucent in appearance.