Galena (mineral) - MSN Encarta

Windows Live® Search Results

Galena Mineral Data
Auction Rules] [Current Listing] e-Rocks.com, auction and sales venue for all rock and mineral enthusiasts Our mission is to provide an online centre for Buyers and ...
Galena - Wikipedia, the free encyclopedia
Galena is the natural mineral form of lead sulfide. It is the most important lead ore mineral. Galena is one of the most abundant and widely distributed sulfide minerals.
Galena: Galena mineral information and data.
Galena is the primary ore mineral of lead. Worked for its lead content as early as 3000BC, it is found in ore veins with sphalerite, pyrite, chalcopyrite, fahlore etc., and in ...

See all search results in
Windows Live® Search Results

Galena (mineral), a mineral consisting of lead sulfide (PbS). It crystallizes in the isometric system (see Crystal), in well-formed cubes and cuboctahedrons, but it also occurs in large masses with a coarse or granular structure. Galena is characterized by perfect cubic cleavage, softness, heaviness, and the ease with which it is fused. Opaque, gray to black in color, galena has a metallic luster. Its specific gravity is 7.4 to 7.6 and its hardness 2.5 to 2.75.

Galena is an important lead and silver ore. It usually contains small amounts of silver and is often mined for the silver as well as for the lead. Smaller amounts of other metals, such as copper, gold, arsenic, antimony, and selenium, also occur in galena deposits. It is widely distributed and is frequently found associated with the sulfides of iron, copper, or zinc. In the United States the principal deposits are in Idaho, Kansas, Missouri, Montana, Oklahoma, Utah, and Wisconsin.