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Ettringite
Ettringite

Atacamite
Atacamite



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Ettringite
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Atacamite

Ettringite and Atacamite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Adamantine, Vitreous
1.2 Pleochroism
Not Available
X = pale green; Y = yellow-green; Z = grass-green
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
Not Available
1.5 Refractive Index
1.470-1.4911.831
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Orthorhombic
1.8 Birefringence
0.0210.049
Achroite
0 0.296
1.9 Clarity
Transparent
Not Available

Ettringite and Atacamite Optic Character

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

Ettringite and Atacamite Transparency

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