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Ettringite and Spodumene Optical Properties


Spodumene and Ettringite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Not Available   
Strong in kunzite: α-purple   

Dispersion
Not Available   
0.02   
22

Transparency
Transparent, Translucent   
Transparent   

Refractive Index
1.470-1.491   
1.657-1.681   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
monoclinic   

Birefringence
0.021   
0.014-0.018   

Clarity
Transparent   
Gems   

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Ettringite and Spodumene Optic Character

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

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

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