• Bournonite with Freibergite
  • Bournonite with Freibergite
  • Bournonite with Freibergite
Gallery

Bournonite with Freibergite

$2,000.00   €1,640  £1,480.00 approx.  

This specimen is priced in US dollars, all other prices are approximate.

ID: CC19998
This is a spectacular open group of superb Bournonite crystals displaying an excellent cogwheel habit, all embedded in a matrix of finely crystallised Freibergite. Things do not get much better when even the matrix is a well crystallised rare sulphosalt!  Four major Bournonite crystals dominate the specimen with three of these sitting at the front.  Other smaller Bournonite crystals to over 1 cm are distributed throughout the Freibergite.  The three main display Bournonites measure approximately 2.2 x 2.2 x 0.7 cm, 2.2 x 1.5 x 1.0 cm and 1.7 x 1.2 x 1.0 cm.  All Bournonites are lustrous metallic silver-grey with mirror-flat pinacoid faces and deeply striated/grooved cogwheel prism faces, with some forming interpenetrant pairs.  The Freibergite, a complex silver-copper-iron-antimony-arsenic sulphosalt, forms as gunmetal-grey crystals all to about 1 mm across, of which there are many thousand on the specimen.  Bournonite is a lead-copper sulphosalt and is classified as a lead-copper antimoniate.  A magnificent large miniature, or small cabinet, specimen of Bournonite with Freibergite from Bolivia.

Details

Dimensions
6.3 × 5.7 × 4.0 cm
Categories
Rare Minerals, Sulphides, Sulphosalts and Arsenides
Locality
Viboras Mine, Machacamarca, Machacamarca District, Cornelio Saavedra Province, Potosí Department, Bolivia

Minerals on Specimen

Minerals on specimen
Bournonite, Freibergite

Related Mineral Specimens

Bournonite
$3,500
 Herodsfoot Mine, Lanreath, Cornwall, England, Europe
Very nicely developed, but somewhat unusual mirror-bright Bournonite crystals to 14 mm nestled...
Bournonite with Quartz
$1,500
 Baia Sprie, Maramures Co, Romania, Europe
A really fine specimen of Bournonite from Baia Sprie, Romania. Crystals of metallic grey cogwheel...
Bournonite with Quartz on Chalcopyrite
$1,000
 Baia Sprie, Maramures Co, Romania, Europe
Bright metallic grey crystals of Bournonite measuring to 9mm displaying some cogwheel twinning are...
Bournite with Pyrite
$800
 Baia Sprie, Maramures Co, Romania, Europe
Fine well-formed characteristic crystals of Bournonite measuring to 9mm are neatly clustered over a...