• Chalcopyrite var. Blister Copper pseudomorphing after Chalcocite
  • Chalcopyrite var. Blister Copper pseudomorphing after Chalcocite
  • Chalcopyrite var. Blister Copper pseudomorphing after Chalcocite

Chalcopyrite var. Blister Copper pseudomorphing after Chalcocite

ID: CC21577
For all collectors of Cornish minerals, here is something very different indeed!  I have to admit it is a first for me and I’ve had an interest in Cornish mineralogy for at least forty years.  This quite amazing small cabinet specimen is a porous mass of golden brassy Chalcopyrite of the variety Blister Copper, pseudomorphing after Chalcocite from the Cook's Kitchen mine at Pool to the north of Carn Brea in Cornwall, England.  Pool lies about midway between the famous Cornish mining towns of Camborne and Redruth.  The Chalcopyrite forms rod-like pseudomorphs of about 1 mm diameter and often exceeding 1 cm in length, whose surfaces take on the botryoidal habit of Blister Copper, albeit these being micro-blisters!  They form an interconnected network of high porosity, so despite the quantity of metallic sulphides present, the specimen is light weight due to its low bulk density.  The Chalcopyrite, pseudomorphing after Chalcocite, is fascinating and aesthetic.  A superb and rare Cornish specimen from Cook's Kitchen mine.

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8.0 × 7.3 × 4.6 cm
Pseudomorphs, Sulphides, Sulphosalts and Arsenides
Cook's Kitchen Mine, Pool, Carn Brea, Cornwall, England

Minerals on Specimen

Minerals on specimen

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