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Pectolite and Ettringite Optical Properties


Ettringite and Pectolite Optical Properties


Optical Properties

Luster
Silky   
Vitreous   

Pleochroism
NilArthur Thomas   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Transparent   
Transparent, Translucent   

Refractive Index
1.595-1.645   
1.470-1.491   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
Trigonal   

Birefringence
0.028-0.038   
0.021   

Clarity
Transparent   
Transparent   

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Pectolite and Ettringite Optic Character

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

Similar to their colors, Pectolite and Ettringite 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, Pectolite is Transparent while Pectolite is Transparent in appearance.

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