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Hessonite and Ettringite Optical Properties


Ettringite and Hessonite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004)   
Transparent, Translucent   

Refractive Index
1.742-1.748   
1.470-1.491   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Trigonal   

Birefringence
Not Available   
0.021   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
Transparent   

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Hessonite and Ettringite Optic Character

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

Similar to their colors, Hessonite 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, Hessonite is Gemmological Tables (2004) while Hessonite is Gemmological Tables (2004) in appearance.

Brown Gemstones

Brown Gemstones


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