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Pearl and Ludlamite Optical Properties


Ludlamite and Pearl Optical Properties


Optical Properties

Luster
Pearly   
Vitreous, Pearly   

Pleochroism
AbsentWalter Schumann   
NilArthur Thomas   

Dispersion
None   
Not Available   

Transparency
Translucent, Opaque   
Gemmological Tables (2004) More from other references   

Refractive Index
1.52-1.66   
1.653-1.693   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
monoclinic   

Birefringence
0.156   
0.038-0.044   

Clarity
Translucent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Pearl and Ludlamite Optic Character

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

Similar to their colors, Pearl 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, Pearl is Opaque and Translucent while Pearl is Opaque and Translucent in appearance.

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