Dumortierite and Schultenite Optical Properties

Dumortierite

Schultenite

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Adamantine

1.2 Pleochroism

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

Not Available

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Translucent, Translucent to opaque

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.669-1.7231.890-1.976

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.011-0.037Not Available

0 0.296

1.9 Clarity

Translucent

TransparentAnthony et al

Dumortierite and Schultenite Optic Character

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

Similar to their colors, Dumortierite and Schultenite 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, Dumortierite is Translucent and Translucent to opaque while Dumortierite is Translucent and Translucent to opaque in appearance.