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Prasiolite
Prasiolite

Siderite
Siderite



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Prasiolite
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Siderite

Prasiolite and Siderite Optical Properties

Optical Properties

Luster

Vitreous
Pearly

Pleochroism

Very weak: light green pale greenWalter Schumann
-

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

Transparent, Translucent
Transparent, Translucent

Refractive Index

1.544-1.5531.633-1.875
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Trigonal

Birefringence

0.0090.242
0 0.296
👆🏻

Clarity

Transparent
Transparent

Prasiolite and Siderite Optic Character

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

Prasiolite and Siderite Transparency

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