• Bournonite with Freibergite
  • Bournonite with Freibergite
  • Bournonite with Freibergite
Sulphides, Sulphosalts and Arsenides

Bournonite with Freibergite

$2,000.00   €1,668  £1,440.00 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

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