Scheelite and Dumortierite Optical Properties

Scheelite

Dumortierite

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1 Optical Properties

1.1 Luster

Vitreous, Adamantine

Vitreous

1.2 Pleochroism

Definite dichoric in yellow (yellow to orange-brown)

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

1.3 Dispersion

0.04None

0.007 1

1.4 Transparency

Translucent, Transparent

Translucent, Translucent to opaque

1.5 Refractive Index

1.918-1.9361.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Orthorhombic

1.8 Birefringence

0.0160.011-0.037

0 0.296

1.9 Clarity

Translucent

Scheelite and Dumortierite Optic Character

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

Similar to their colors, Scheelite 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, Scheelite is Translucent and Transparent while Scheelite is Translucent and Transparent in appearance.