Mineral Information and Data:

Cuprite
Cu2O [CNMNC approved formula]

Named from the Latin for copper.

IMA status : Valid species (Pre-IMA 1845) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
04.01.01.01  
  (04) Simple Oxides
  (04.01) with a cation charge of 1+ (A+2 O)
  (04.01.01)
  
Nickel-Strunz
(10th edition) :
04.AA.10
  (04) Oxides and Hydroxides
  (04.A) Metal:Oxygen = 2.1 and 1:1
  (04.AA) Cation:Anion (M:O) = 2:1 (and 1.8:1)
  
Crystal system: Cubic System
Point group (H-M): m3m (or 4/m 3 2/m) — hexoctahedral
Unit cell: a = 4.270 Å
Crystal Habit: Crystals cubic, octahedral, or dodecahedral; hair-like forming wads or mats (Chalcotrichite); massive, compact, granular
  
Color: Red, brownish red, purplish red to almost black
Diaphaneity: Transparent to translucent
Luster: Adamantine, Sub-Metallic, Earthy
Hardness (Mohs): 3.5 to 4
Measured Density: 6.14 g/cm3
Cleavage: 2; {111} interrupted, {001} rare
Tenacity: Brittle
Fracture: Conchoidal to uneven
Streak: Shining metallic brownish-red.
  
Geologic Setting: A common mineral in the oxidized portions of many copper deposits.
Mineral Association: Copper, tenorite, malachite, azurite, calcite, brochantite, antlerite, atacamite, chrysocolla, iron oxides, clay minerals
  
Synonyms/varieties: Chalcotrichite (capillary var.), Octahedral Copper Ore, Ruby Copper
Other Properties: Gemstone Rare.

 

Cuprite
Origin: Mashaba West mine, Congo
Sample size: single crystal 1.5 cm
Photo: Tom Loomis

 

Cuprite
Cuprite with copper
Origin: Chenmenshan mine, Jiangxi Province, China
Sample size: 6.5 x 4 x 3cm
Photo: Tom Loomis

 

Cuprite
(zoom-in of above)

 

Cuprite
Variety Chalcotrichite
Origin: Chenmenshan mine, Jiangxi Province, China
Sample size: 7 x 2 x 3 cm
Photo: Tom Loomis

 

Cuprite
(zoom-in of above)

<<< BACK TO MINERAL SEARCH