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Atacamite
Atacamite

Almandine
Almandine



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Atacamite
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Atacamite and Almandine Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Vitreous
Greasy, Vitreous
1.2 Pleochroism
X = pale green; Y = yellow-green; Z = grass-green
None
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
0.03
Rank: 15 (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.831
1.770-1.820
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
cubic
1.8 Birefringence
0.049
Not Available
1.9 Clarity
Not Available
TransparentUlrich Henn and Claudio C. Milisenda

Atacamite and Almandine Optic Character

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

Similar to their colors, Atacamite and Almandine 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.

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