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Gedrite and Ludlamite Optical Properties


Ludlamite and Gedrite Optical Properties


Optical Properties

Luster
Vitreous  
Vitreous, Pearly  

Pleochroism
Weak to moderate  
-  

Dispersion
0.02  
99+
0.02  
99+

Transparency
Transparent  
-  

Refractive Index
1.625-1.718  
1.653-1.693  

Optic Character
-  
-  

Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma  
monoclinic  

Birefringence
-9999  
0.038-0.044  

Clarity
Transparent  
TransparentUlrich Henn and Claudio C. Milisenda  

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Gedrite and Ludlamite Optic Character

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

Similar to their colors, Gedrite and Ludlamite 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, Gedrite is Transparent while Gedrite is Transparent in appearance.

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