Cordierite and Scheelite Optical Properties

Cordierite

Scheelite

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1 Optical Properties

1.1 Luster

Greasy, Vitreous

Vitreous, Adamantine

1.2 Pleochroism

X = pale yellow

Definite dichoric in yellow (yellow to orange-brown)

1.3 Dispersion

NA0.04

0.007 1

1.4 Transparency

Not Available

Translucent, Transparent

1.5 Refractive Index

Not Available1.918-1.936

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

tetragonal

1.8 Birefringence

Not Available0.016

0 0.296

1.9 Clarity

Not Available

Translucent

Cordierite and Scheelite Optic Character

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

Similar to their colors, Cordierite and Scheelite 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, Cordierite is Not Available while Cordierite is Not Available in appearance.