Variscite and Dumortierite Optical Properties

Variscite

Dumortierite

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1 Optical Properties

1.1 Luster

Vitreous, Waxy

Vitreous

1.2 Pleochroism

MissingWalter Schumann

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

Translucent, Opaque . May be translucent when backlit on the edges.

Translucent, Translucent to opaque

1.5 Refractive Index

1.560-1.5941.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

1.8 Birefringence

0.0310.011-0.037

0 0.296

1.9 Clarity

Translucent

Variscite and Dumortierite Optic Character

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

Similar to their colors, Variscite 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, Variscite is Opaque . May be translucent when backlit on the edges. and Translucent while Variscite is Opaque . May be translucent when backlit on the edges. and Translucent in appearance.