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Peridot
Peridot

Atacamite
Atacamite



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Peridot
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Atacamite

Peridot and Atacamite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Greasy
Adamantine, Vitreous
1.2 Pleochroism
Weak: yellow-green green (colorless)Herve Nicolas Lazzarelli
X = pale green; Y = yellow-green; Z = grass-green
1.3 Dispersion
0.02NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent
Not Available
1.5 Refractive Index
1.64-1.691.831
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Orthorhombic
1.8 Birefringence
0.0360.049
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Peridot and Atacamite Optic Character

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

Peridot and Atacamite Transparency

Similar to their colors, Peridot and Atacamite 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, Peridot is Transparent while Peridot is Transparent in appearance.