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Mineralpedia Details for Arsenic

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Arsenic

Arsenic

Named for the Latin word for the element arsenicum, and earlier for the Greek arsenikos, meaning “male,” in reference to Arsenic’s potent properties. Arsenic is uncommon, but with a number of localities including in Germany, France, the Czech Republic, Romania, the United States, Peru, Borneo, Japan, and China, for localities of some interest. Arsenic forms in hydrothermal veins and in deposits that contain other arsenic minerals, and cam occasionally be found in cobalt-silver sulfide veins.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/arsenic.pdf

Formula
As 
Crystal System
Trigonal 
Crystal Habit
Nodular, Reniform, Lamellar 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
lead gray, gray, white 
Streak
black 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
3.5 
WebMineral
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Mindat
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Arsenic from Kusa mine, near Bau, Borneo, Malaysia

Arsenic
            from Kusa mine, near Bau, Borneo, Malaysia
Special Info
Poisonous!!

Crusty gray botryoidal Arsenic with thin concentric layers visible in the cross sections of the botryoids.

Click thumbnail images for larger view.

Arsenic from Pribram, Bohemia, Czech Republic

Arsenic
            from Pribram, Bohemia, Czech Republic

Compact, dull grey, reniform Arsenic. This is a large than usual specimen relative to most localities.

Click thumbnail images for larger view.

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