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Siderite
Siderite

Pleonaste
Pleonaste



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Siderite
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Pleonaste

Siderite and Pleonaste Optical Properties

Optical Properties

Luster

Pearly
-

Pleochroism

-
-

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.633-1.8751.780
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
-

Birefringence

0.242-9999
0 0.296
👆🏻

Clarity

Transparent
-

Siderite and Pleonaste Optic Character

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

Similar to their colors, Siderite and Pleonaste 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.