Pearl and Dumortierite Optical Properties

Pearl

Dumortierite

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1 Optical Properties

1.1 Luster

Pearly

Vitreous

1.2 Pleochroism

AbsentWalter Schumann

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

1.3 Dispersion

NoneNone

0.007 1

1.4 Transparency

Translucent, Opaque

Translucent, Translucent to opaque

1.5 Refractive Index

1.52-1.661.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

1.8 Birefringence

0.1560.011-0.037

0 0.296

1.9 Clarity

Translucent

Pearl and Dumortierite Optic Character

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

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Pearl and Dumortierite Transparency

Similar to their colors, Pearl 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, Pearl is Opaque and Translucent while Pearl is Opaque and Translucent in appearance.