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Danburite
Danburite

Dumortierite
Dumortierite



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Danburite
X
Dumortierite

Danburite and Dumortierite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Greasy
Weak: pale yellow yellow
0.02
-
1.627-1.639
Biaxial/+
Orthorhombic
0.006
TransparentUlrich Henn and Claudio C. Milisenda
 
Vitreous
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
0.01
Translucent, Translucent to opaque
1.669-1.723
-
Orthorhombic
0.011-0.037
Translucent

Danburite and Dumortierite Optic Character

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

Danburite and Dumortierite Transparency

Similar to their colors, Danburite 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, Danburite is while Danburite is in appearance.