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Amethyst and Sard Optical Properties


Sard and Amethyst Optical Properties


Optical Properties

Luster
Vitreous   
Waxy   

Pleochroism
None   
AbsentWalter Schumann   

Dispersion
0.01   
27
None   

Transparency
Transparent, Transparent to translucent   
Translucent   

Refractive Index
1.544-1.553   
1.535-1.539   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.009   
0.008-0.010   

Clarity
Transparent   
Translucent   

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Amethyst and Sard Optic Character

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

Similar to their colors, Amethyst and Sard 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, Amethyst is Transparent and Transparent to translucent while Amethyst is Transparent and Transparent to translucent in appearance.

Semi Precious

Semi Precious


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