Andesine and Black Opal Optical Properties

Andesine

Black Opal

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1 Optical Properties

1.1 Luster

Vitreous

Not Available

1.2 Pleochroism

colorless.

AbsentWalter Schumann

1.3 Dispersion

Albite Optical ..

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0.70

Rank: 2 (Overall)▶

None

Rank: N/A (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

1.5 Refractive Index

1.543-1.564

1.370-1.470

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Triclinic

Not Available

1.8 Birefringence

0.007-0.011

Not Available

1.9 Clarity

Transparent

Andesine and Black Opal Optic Character

Andesine and Black Opal optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Andesine and Black 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 Andesine and Black 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. Andesine has Biaxial/+ character.

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Andesine and Black Opal Transparency

Similar to their colors, Andesine and Black 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, Andesine is Translucent, Transparent and Transparent to translucent while Andesine is Translucent, Transparent and Transparent to translucent in appearance.