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Scheelite and Dumortierite Optical Properties


Dumortierite and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine   
Vitreous   

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   

Dispersion
0.04   
12
None   

Transparency
Translucent, Transparent   
Translucent, Translucent to opaque   

Refractive Index
1.918-1.936   
1.669-1.723   

Optic Character
Not Available   
Not Available   

Crystal System
tetragonal   
Orthorhombic   

Birefringence
0.016   
0.011-0.037   

Clarity
Translucent   
Translucent   

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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.

Yellow Gemstones

Yellow Gemstones


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