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Phosphosiderite and Amblygonite Optical Properties


Amblygonite and Phosphosiderite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Pearly   

Pleochroism
Pale rose-red carmine-red colorlessAnthony et al   
weak to none   

Dispersion
Not Available   
0.01   
26

Transparency
Transparent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.692-1.739   
1.578-1.646   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Not Available   
Triclinic   

Birefringence
0.240   
0.020-0.030   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Phosphosiderite and Amblygonite Optic Character

Phosphosiderite and Amblygonite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Phosphosiderite and Amblygonite 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 Phosphosiderite and Amblygonite 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. Amblygonite has Biaxial/+ character.

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Phosphosiderite and Amblygonite Transparency

Similar to their colors, Phosphosiderite and Amblygonite 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, Phosphosiderite is Transparent while Phosphosiderite is Transparent in appearance.

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