Vesuvianite and Dumortierite Optical Properties

Vesuvianite

Dumortierite

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1 Optical Properties

1.1 Luster

Vitreous, Resinous

Vitreous

1.2 Pleochroism

slight in colored varieties

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

Not Available

Translucent, Translucent to opaque

1.5 Refractive Index

1.703-1.7521.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Orthorhombic

1.8 Birefringence

0.004-0.0060.011-0.037

0 0.296

1.9 Clarity

Not Available

Translucent

Vesuvianite and Dumortierite Optic Character

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

Similar to their colors, Vesuvianite 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, Vesuvianite is Not Available while Vesuvianite is Not Available in appearance.