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Legrandite and Ettringite Optical Properties


Ettringite and Legrandite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Colorless   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Gems   
Transparent, Translucent   

Refractive Index
1.702-1.740   
1.470-1.491   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Trigonal   

Birefringence
0.060   
0.021   

Clarity
Gems   
Transparent   

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Legrandite and Ettringite Optic Character

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

Similar to their colors, Legrandite 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, Legrandite is Gems while Legrandite is Gems in appearance.

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