Tugtupite and Dumortierite Optical Properties

Tugtupite

Dumortierite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

ModerateArthur Thomas

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

OpaqueHerve Nicolas Lazzarelli

Translucent, Translucent to opaque

1.5 Refractive Index

1.494-1.5041.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Orthorhombic

1.8 Birefringence

0.0080.011-0.037

0 0.296

1.9 Clarity

OpaqueHerve Nicolas Lazzarelli

Translucent

Tugtupite and Dumortierite Optic Character

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

Similar to their colors, Tugtupite 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, Tugtupite is OpaqueHerve Nicolas Lazzarelli while Tugtupite is OpaqueHerve Nicolas Lazzarelli in appearance.