Cuprite

Cuprite is a copper oxide secondary mineral used as an ore of copper. It typically forms in copper sulfide deposits, along with azurite, chrysocolla, and malachite.

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Information about Cuprite

Appearance

A copper oxide mineral occurring in a range of colours from a scarlet red to dark red – almost black.


Uses and History

A minor ore of copper, and very infrequently used for faceted stones. Popular amongst mineral collectors.

Named in 1845 by Wilhelm Karl von Haidinger from the Latin word ‘cuprum’, due to its composition.

Sometimes known as ruby copper due to its colours.


Mineralogy

Chemistry
Copper oxide mineral with the formula Cu2O
Colours and Variations

Scarlet to dark red, sometimes almost black.

Streak
Brownish red
Luster
Adamantine, submetallic, metallic
Transparency
Opaque to translucent under bright backlight. Fine crystals may be transparent.
Fracture
Uneven
Crystal habit
Usually octahedral or in octahedral clusters, sometimes cubic or cubic clusters. Twinning is possible. Sometimes fibrous, massive, radiating. Often occurs as a crust on the surface of native Copper.
Mohs hardness
3.5 – 4
Fluorescence
Specific Gravity
6.14
Easiest testing method

Hazards and Warnings

 

Mineral collectors should wash their hands after handling specimens, to avoid any exposure to potential toxins.

Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis. When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.


Translations

Arabic:

Hindi:

Portuguese:

  • Cuprita

Bengali:

Indonesian:

Punjabi:

English:

  • Cuprite

Italian:

Russian:

  • Куприт

French:

Japanese:

  • キュプライト

Spanish:

  • Cuprita

German:

  • Cuprit

Korean:

Thai:

Gujurati:

Mandarin Chinese:

  • 赤铜矿

Urdu:


Further Reading / External Links

  • https://en.wikipedia.org/wiki/Cuprite
  • https://www.mindat.org/min-1172.html
  • https://www.minerals.net/mineral/cuprite.aspx
  • http://webmineral.com/data/Cuprite.shtml