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Purpurite and Iolite Optical Properties


Iolite and Purpurite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
StrongArthur Thomas   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
TranslucentWalter Schumann, Gemstones of the world (2001) More from other references   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.85-1.92   
1.52-1.56   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Orthorhombic   

Birefringence
0.070   
Not Available   

Clarity
TranslucentWalter Schumann   
Transparent to translucent   

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Purpurite and Iolite Optic Character

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

Similar to their colors, Purpurite and Iolite 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, Purpurite is Gemstones of the world (2001) More from other references and TranslucentWalter Schumann while Purpurite is Gemstones of the world (2001) More from other references and TranslucentWalter Schumann in appearance.

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