Copper Filigree in Gypsum


Copper is widely distributed in the oxidized zones of many sulfide copper deposits where it may be accompanied by cuprite, malachite, azurite, tenorite and limonite. It also occurs in sedimentary rocks and cavities in volcanic rocks. Copper may psuedomorphically replace other minerals such as malachite, cuprite, azurite and chalcopyrite.

Calcium Sulfate Hydrate, CaSO4.2H2O

Gypsum is a common mineral of widespread and abundant occurrence. It is formed during the evaporation of the waters of inland seas and salt lakes and is a common constituent of the oxidized zones of sulfide ores.

Rocks from Bob's Collection

Index of Specimen Images

Table of Contents 8/8/95