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Nickeline and Grandidierite Optical Properties


Grandidierite and Nickeline Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Pearly   

Pleochroism
Strong (reflected light)   
visible   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Gemmological Tables (2004) More from other references   

Refractive Index
Not Available   
1.578-1.639   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Orthorhombic   

Birefringence
Not Available   
0.037-0.039   

Clarity
Not Available   
Gemmological Tables (2004) More from other references   

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Nickeline and Grandidierite Optic Character

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

Similar to their colors, Nickeline and Grandidierite 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, Nickeline is Not Available while Nickeline is Not Available in appearance.

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