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Siderite and Sard Optical Properties


Sard and Siderite Optical Properties


Optical Properties

Luster
Pearly   
Waxy   

Pleochroism
Not Available   
AbsentWalter Schumann   

Dispersion
Not Available   
None   

Transparency
Transparent, Translucent   
Translucent   

Refractive Index
1.633-1.875   
1.535-1.539   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.242   
0.008-0.010   

Clarity
Transparent   
Translucent   

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Siderite and Sard Optic Character

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

Similar to their colors, Siderite and Sard 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, Siderite is Translucent and Transparent while Siderite is Translucent and Transparent in appearance.

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