Mineral Information and Data:

Calaverite
AuTe2 [CNMNC approved formula]

Named after the locality; Calaveras Co., California.

IMA status : Valid species (Pre-IMA 1868) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
02.12.13.02  
  (02) Sulfides - Including Selenides and Tellurides
  (02.12) where Am Bn Xp, with (m+n):p=1:2
  (02.12.13) Krennerite Group
  
Nickel-Strunz
(10th edition) :
02.EA.10
  (02) Sulfides
  (02.E) Metal Sulfides, M:S = 1:2
  (02.EA) M:S = 1:2
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
Unit cell: a = 35.96 Ǻ, b = 4.41 Ǻ, c = 16.81 Ǻ, β = 115.3°
Crystal Habit: Crystals lath-like or bladed, short prisms striated parallel to elongation; massive, granular
Twinning: Common on {010}, {310}, or {111}
  
Color: Brass-yellow to silver-white
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 2.5 to 3
Measured Density: 9.10 to 9.40 g/cm3
Tenacity: Brittle
Fracture: Uneven to subconchoidal
Streak: Greenish to yellow
  
Polymorphism and Series: Dimorphous with krennerite
Geologic Setting: Typically in veins in low-temperature hydrothermal deposits, but also in medium and high-temperature deposits.
Mineral Association: Altaite, coloradoite, krennerite, rickardite, other tellurides, pyrite, arsenopyrite,
tetrahedrite, tennantite, sphalerite, stibnite, other sulfides
Ore deposits: An important ore mineral of gold.
  

 

Calaverite
Calaverite with quartz
Origin: Cripple Creek, Teller Co., Colorado, U.S.A.
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Calaverite
Calaverite with quartz
Origin: Cripple Creek, Teller Co., Colorado, U.S.A.
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Calaverite
Origin: Cripple Creek, Teller Co., Colorado, United States
Sample size: 4 x 3 x 1.5 cm
Photo: Tom Loomis

 

Calaverite
(zoom-in of above)

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