Labradorite and Dumortierite Optical Properties

Labradorite

Dumortierite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Pearly

Vitreous

1.2 Pleochroism

From the Congo

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

1.3 Dispersion

0.01None

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Translucent, Translucent to opaque

1.5 Refractive Index

1.554-1.5731.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

Orthorhombic

1.8 Birefringence

0.008-0.0100.011-0.037

0 0.296

1.9 Clarity

Transparent

Translucent

Labradorite and Dumortierite Optic Character

Labradorite and Dumortierite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Labradorite and Dumortierite 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 Dumortierite 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 Gems for Aquarius

Labradorite Vs Rhyolite

Labradorite Vs Chrysanthemum Stone

Labradorite Vs Albite

Labradorite and Dumortierite Transparency

Similar to their colors, Labradorite and Dumortierite 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.