Pezzottaite and Dumortierite Optical Properties

Pezzottaite

Dumortierite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Moderate dichroic

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

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

Transparent

Translucent, Translucent to opaque

1.5 Refractive Index

1.598-1.6201.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

Orthorhombic

1.8 Birefringence

0.008-0.0110.011-0.037

0 0.296

1.9 Clarity

Transparent

Translucent

Pezzottaite and Dumortierite Optic Character

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

Similar to their colors, Pezzottaite 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, Pezzottaite is Transparent while Pezzottaite is Transparent in appearance.