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Atacamite
Atacamite

Howlite
Howlite



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Atacamite
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Howlite

Atacamite and Howlite Optical Properties

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1 Optical Properties
1.1 Luster
Adamantine, Vitreous
Vitreous
1.2 Pleochroism
X = pale green; Y = yellow-green; Z = grass-green
NilArthur Thomas
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
1.8311.583-1.608
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
monoclinic
1.8 Birefringence
0.0490.019
Achroite
0 0.296
1.9 Clarity
Not Available
Gemmological Tables (2004) More from other references

Atacamite and Howlite Optic Character

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

Similar to their colors, Atacamite and Howlite 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.