Chalcopyrite pseudomorph after chalcocite

Reference: 1884

These unusual pseudomorphs were found in the 1980's for a short time at Judkins quarry in the West Midlands.  This is a rich example of chalcopyrite thought to be after acicular chalcocite with crystals up to 10mm associated with a little calcite and sugary barite.  For further details see Roy Starkey's book  'Minerals of the English Midlands' -  Page 323. Ex. K. Snell collection

Formulas : Chalcopyrite CuFeS₂ ; Chalcocite Cu₂S

Status: Sold

Dimensions: 70x40x17mm

Size: Small Cabinet (S)