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Obsidian
Obsidian

Atacamite
Atacamite



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Obsidian
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Atacamite

Obsidian and Atacamite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Adamantine, Vitreous
1.2 Pleochroism
AbsentWalter Schumann
X = pale green; Y = yellow-green; Z = grass-green
1.3 Dispersion
0.01NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Not Available
1.5 Refractive Index
1.450-1.5501.831
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Amorphous
Orthorhombic
1.8 Birefringence
Not Available0.049
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Obsidian and Atacamite Optic Character

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

Obsidian and Atacamite Transparency

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