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Atacamite
Atacamite

Siderite
Siderite



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Atacamite
X
Siderite

Atacamite and Siderite Optical Properties

Optical Properties

Luster

Adamantine, Vitreous
Pearly

Pleochroism

X = pale green; Y = yellow-green; Z = grass-green
-

Dispersion

0.030.04
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

1.8311.633-1.875
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.0490.242
0 0.296
👆🏻

Clarity

-
Transparent

Atacamite and Siderite Optic Character

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

Atacamite and Siderite Transparency

Similar to their colors, Atacamite 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, Atacamite is while Atacamite is in appearance.