Science Fair Project Encyclopedia
|Chemical formula||lead sulfide (PbS)|
|Colour||Lead gray, silvery|
|Crystal habit||Cubes, tabular and sometimes skeletal crystals|
|Fracture||Flat (when cubic) to even|
|Mohs Scale hardness||2.5 - 2.75|
|Specific gravity||7.4 - 7.6|
Galena is a mineral, an ore of lead, lead sulfide (PbS). Galena is one of the most abundant and widely distributed sulfide minerals, and is the main ore of lead. Crystals are usually cubic, sometimes octahedral. It is often associated with the minerals sphalerite and fluorite. Galena deposits sometimes contain significant amounts of silver as an impurity, and these galenas have long been the most important ore of silver in mining.
Galena deposits are found in Germany, France, Romania, Austria, Belgium, Italy, Spain, Scotland, England, Australia, and Mexico. In the United States it occurs in Missouri, Illinois, Iowa, Kansas, Oklahoma, Colorado, Idaho, Utah, Montana, and Wisconsin.
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