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Sunstone and Yttrium Aluminium Garnet Optical Properties


Yttrium Aluminium Garnet and Sunstone Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Weak or absentWalter Schumann   
Not Available   

Dispersion
None   
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
Gemmological Tables (2004)   

Refractive Index
1.53-1.55   
1.833   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
Not Available   

Birefringence
0.007-0.010   
Not Available   

Clarity
Transparent to translucent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Sunstone and Yttrium Aluminium Garnet Optic Character

Sunstone and Yttrium Aluminium Garnet optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sunstone and Yttrium Aluminium Garnet 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 Sunstone and Yttrium Aluminium Garnet 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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Sunstone and Yttrium Aluminium Garnet Transparency

Similar to their colors, Sunstone and Yttrium Aluminium Garnet 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, Sunstone is Translucent, Transparent and Transparent to translucent while Sunstone is Translucent, Transparent and Transparent to translucent in appearance.

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