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Dallasite and Dumortierite Optical Properties


Dumortierite and Dallasite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Not Available   
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue   

Dispersion
Not Available   
None   

Transparency
Not Available   
Translucent, Translucent to opaque   

Refractive Index
1.540   
1.669-1.723   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Orthorhombic   

Birefringence
0.008-0.010   
0.011-0.037   

Clarity
Not Available   
Translucent   

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Dallasite and Dumortierite Optic Character

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

Similar to their colors, Dallasite 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, Dallasite is Not Available while Dallasite is Not Available in appearance.

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Green Gemstones


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