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Native copper

Copper

MNHN N°108.28

visu_142 infos

FROM : Hougton canton, Michigan, USA
SIZE : 7.3 x 3.7 x 2 cm

general description

Crystals are prismatic and copper-red, tehy measure about 1 cm length . The sample measures 7.3 x 3.7 x 2 cm.

This arborescent sample of native copper comes from Hougton canton, Michigan, USA. It has been bought in 1908 to a commercial Mr. Boubée.

It is kept in the reserves of the collections of the Muséum national d'Histoire naturelle (i.e., not yet displayed to the public).

Photography: Louis-Dominique Bayle, © MNHN.

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Identity card

SPECIE : Native copper

HISTORY : Name inspired from the Greek word "cuprum" [kyprios], Cyprus Island where copper was mined during the Antiquity

Species first described in 77 by Caius Plinius Secundus (23-79 AC), Roman naturalist

Type-locality: unknown

CHEMICAL FORMULA : Cu
CRYSTAL SYSTEM : Cubic
COLOR : Pink pale to red-orange
DIAPHANIETY : Opaque
LUSTER : Metallic
STREAK : Red
MORPHOLOGY : Cubic crystals, dodecahedra, filiforms, arborescent
HARDNESS : 2,5-3,0
DENSITY : 8,93

CHEMICAL CLASS : I - Elements
GROUP : Copper
STRUNZ CLASS BEFORE 2001 : 1/A.01-10
STRUNZ CLASS AFTER 2001 : 1.AA.05

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