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Rosasite and Spinel Optical Properties


Spinel and Rosasite Optical Properties


Optical Properties

Luster
Silky, Vitreous   
Vitreous   

Pleochroism
Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue   
Absent   

Dispersion
Not Available   
0.02   
18

Transparency
Not Available   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.672-1.688   
1.73   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Isometric   

Birefringence
0.139-0.143   
Not Available   

Clarity
Not Available   
TransparentUlrich Henn and Claudio C. Milisenda   

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Rosasite and Spinel Optic Character

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

Similar to their colors, Rosasite and Spinel 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, Rosasite is Not Available while Rosasite is Not Available in appearance.

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