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Atacamite
Atacamite

Cryolite
Cryolite



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Atacamite
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Cryolite

Atacamite and Cryolite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Vitreous
Vitreous, Greasy, Pearly
1.2 Pleochroism
X = pale green; Y = yellow-green; Z = grass-green
colorless.
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Not Available
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.8311.338-1.339
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
monoclinic
1.8 Birefringence
0.0490.001
Achroite
0 0.296
1.9 Clarity
Not Available
TransparentUlrich Henn and Claudio C. Milisenda

Atacamite and Cryolite Optic Character

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

Similar to their colors, Atacamite and Cryolite 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 Not Available while Atacamite is Not Available in appearance.