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Petalite and Sanidine Optical Properties


Sanidine and Petalite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Not Available   

Pleochroism
AbsentWalter Schumann   
WeakMichael O’Donoghue   

Dispersion
0.01   
25
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Transparent   

Refractive Index
1.502-1.523   
1.518-1.536   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Not Available   

Birefringence
0.012-0.016   
0.005-0.008   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Petalite and Sanidine Optic Character

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

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

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