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Copper (Photo)

Year of discovery: Prehistoric (World), AD 708 (Japan)

Locality list: 241 localities of copper

• Cu
• [Cu]

• Class: Gold group
• Class: Native elements
• Insoluble in: HCl

• Color: Copper brown
• Tarnish: Black, Green (in air)
• Streak: Copper brown
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Cubic, Dodecahedron, Tetragon, Octahedron, {111} Tabular, Elongated to [001], Dendritic, Stringy, Film
• Twin:{111} contact or intrusive twin

• Cleavage: No
• Hardness: 2.5-3
• Density: 8.9

• System: Cubic
• Group: m3m, Fm3m
• Lattice: a=3.6

Name: An old Cu-producing locality, Kyprios (Cyprus Island) in Greek changed to cuprum (of Cyprus Island) - aes (metal)

Synonym: Native Copper