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Siderite
Siderite

Pyrite
Pyrite



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Siderite
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Pyrite

Siderite and Pyrite Optical Properties

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Optical Properties

Luster

Pearly
-

Pleochroism

-
-

Dispersion

0.040.04
0.005 1
👆🏻

Transparency

Transparent, Translucent
OpaqueHerve Nicolas Lazzarelli

Refractive Index

1.633-1.875-9999
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Isometric

Birefringence

0.242-9999
0 0.296
👆🏻

Clarity

Transparent
OpaqueHerve Nicolas Lazzarelli

Siderite and Pyrite Optic Character

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

Siderite and Pyrite Transparency

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