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Crocoite and Mellite Optical Properties


Mellite and Crocoite Optical Properties


Optical Properties

Luster
Adamantine   
Vitreous   

Pleochroism
Distinctly trichroic   
Weak: yellowish brown yellowAnthony et al   

Dispersion
Not Available   
Not Available   

Transparency
Transparent   
Gemmological Tables (2004) More from other references   

Refractive Index
2.31-2.66   
1.509-1.541   

Optic Character
Not Available   
Not Available   

Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/n   
Not Available   

Birefringence
Not Available   
0.030   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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<< Physical Properties

Crocoite and Mellite Optic Character

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

Similar to their colors, Crocoite and Mellite 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, Crocoite is Transparent while Crocoite is Transparent in appearance.

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