Labradorite and Ammolite Optical Properties

Labradorite

Ammolite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

Silky, Vitreous

1.2 Pleochroism

From the Congo

None

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Not Available

1.5 Refractive Index

1.554-1.5731.520-1.670

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

Trigonal

1.8 Birefringence

0.008-0.0100.135-0.145

0 0.296

1.9 Clarity

Transparent

Not Available

Labradorite and Ammolite Optic Character

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

Similar to their colors, Labradorite and Ammolite 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, Labradorite is Translucent, Transparent and Transparent to translucent while Labradorite is Translucent, Transparent and Transparent to translucent in appearance.