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Linarite and Danburite Optical Properties


Danburite and Linarite Optical Properties


Optical Properties

Luster
Sub-Adamantine, Vitreous  
Vitreous, Greasy  

Pleochroism
X = pale blue; Y = blue; Z = Prussian blue  
Weak: pale yellow yellow  

Dispersion
0.05  
30
0.02  
99+

Transparency
Transparent  
-  

Refractive Index
1.809-1.859  
1.627-1.639  

Optic Character
-  
Biaxial/+  

Crystal System
monoclinic  
Orthorhombic  

Birefringence
0.050  
0.006  

Clarity
Transparent  
TransparentUlrich Henn and Claudio C. Milisenda  

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Linarite and Danburite Optic Character

Linarite and Danburite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Linarite and Danburite 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 Linarite and Danburite 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 has Biaxial/+ character.

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Linarite and Danburite Transparency

Similar to their colors, Linarite and Danburite 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, Linarite is Transparent while Linarite is Transparent in appearance.

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