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Prehnite and Rubellite Optical Properties


Rubellite and Prehnite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
AbsentWalter Schumann   
Strong: dark red pinkish-redHerve Nicolas Lazzarelli   

Dispersion
None   
0.02   
22

Transparency
Translucent   
Transparent, Translucent   

Refractive Index
1.611-1.673   
1.614-1.666   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Not Available   

Birefringence
0.021-0.033   
0.014-0.040   

Clarity
TranslucentHerve Nicolas Lazzarelli   
Transparent   

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Prehnite and Rubellite Optic Character

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

Similar to their colors, Prehnite and Rubellite 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, Prehnite is Translucent while Prehnite is Translucent in appearance.

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