Opal and Diamond Optical Properties

Opal

Diamond

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Adamantine

1.2 Pleochroism

None

1.3 Dispersion

Albite Optical ..

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None

Rank: N/A (Overall)▶

0.04

Rank: 10 (Overall)▶

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Fluorite Optical Properties

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0.044 (Anglesite Opt..)

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1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent, Translucent, Transparent to opaque

1.5 Refractive Index

1.37-1.52

2.417-2.419

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

cubic

1.8 Birefringence

Not Available

1.9 Clarity

Transparent

Opal and Diamond Optic Character

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

Opal Vs Alexandrite

Opal Vs Lehsunia

Opal Vs Amethyst

Opal and Diamond Transparency

Similar to their colors, Opal and Diamond 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.