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Ammolite and Mellite Optical Properties


Mellite and Ammolite Optical Properties


Optical Properties

Luster
Silky, Vitreous   
Vitreous   

Pleochroism
None   
Weak: yellowish brown yellowAnthony et al   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Gemmological Tables (2004) More from other references   

Refractive Index
1.520-1.670   
1.509-1.541   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.135-0.145   
0.030   

Clarity
Not Available   
TransparentUlrich Henn and Claudio C. Milisenda   

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Ammolite and Mellite Optic Character

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

Similar to their colors, Ammolite 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, Ammolite is Not Available while Ammolite is Not Available in appearance.

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