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Riebeckite and Apophyllite Optical Properties


Apophyllite and Riebeckite Optical Properties


Optical Properties

Luster
Vitreous, Silky   
Vitreous, Pearly   

Pleochroism
X = blue   
Dichroic (colorless)   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Transparent, Translucent   

Refractive Index
1.680-1.698   
1.530-1.543   

Optic Character
Not Available   
Uniaxial/-   

Crystal System
monoclinic   
tetragonal   

Birefringence
0.005-0.008   
0.000-0.003   

Clarity
Not Available   
Transparent   

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Riebeckite and Apophyllite Optic Character

Riebeckite and Apophyllite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Riebeckite and Apophyllite 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 Riebeckite and Apophyllite 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. Apophyllite has Uniaxial/- character.

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Riebeckite and Apophyllite Transparency

Similar to their colors, Riebeckite and Apophyllite 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, Riebeckite is Not Available while Riebeckite is Not Available in appearance.

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