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Alunite and Sanidine Optical Properties


Sanidine and Alunite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Not Available   

Pleochroism
Not Available   
WeakMichael O’Donoghue   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Transparent   

Refractive Index
1.572   
1.518-1.536   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.020   
0.005-0.008   

Clarity
Not Available   
Transparent   

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Alunite and Sanidine Optic Character

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

Similar to their colors, Alunite and Sanidine 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, Alunite is Not Available while Alunite is Not Available in appearance.

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Red Gemstones


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