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Pleonast
Pleonast

Siderite
Siderite



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Pleonast
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Siderite

Pleonast and Siderite Optical Properties

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Optical Properties

Luster

-
Pearly

Pleochroism

-
-

Dispersion

0.030.04
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

-99991.633-1.875
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

-99990.242
0 0.296
👆🏻

Clarity

-
Transparent

Pleonast and Siderite Optic Character

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

Pleonast and Siderite Transparency

Similar to their colors, Pleonast and Siderite 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, Pleonast is while Pleonast is in appearance.