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Aegirine and Feldspar Optical Properties


Feldspar and Aegirine Optical Properties


Optical Properties

Luster
Vitreous, Resinous   
Vitreous   

Pleochroism
X = emerald green   
None   

Dispersion
Not Available   
Not Available   

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

Refractive Index
1.720-1.778   
1.518-1.570   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Triclinic or monoclinic   

Birefringence
0.037-0.061   
0.008-0.010   

Clarity
Gemmological Tables (2004) More from other references   
Transparent   

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Aegirine and Feldspar Optic Character

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

Similar to their colors, Aegirine and Feldspar 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, Aegirine is Gemmological Tables (2004) More from other references while Aegirine is Gemmological Tables (2004) More from other references in appearance.

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