Blue Barite with Chalcopyrite

Barium Sulfate, BaSO4

Barite is a widespread, relatively common mineral which forms under low to moderate temperature conditions in hydrothermal veins. It is also found in sedimentary rocks as replacements, veins and cavity fillings formed by hypogene or meteoric solutions.

Copper Iron Sulfide, CuFeS2

Chalcopyrite occurs in appreciable quantity in nearly all copper sulfide deposits. It is the most important ore mineral of copper. Chalcopyrite is predominately of primary origin in veins and replacement bodies, as disseminated particles in a variety of rock types and in contact metamorphic zones.

Rocks from Bob's Collection

Index of Specimen Images

Table of Contents 8/8/95