the greatest ore of lead, and it contains mostly lead. Lead has been extracted
from Galena for hundreds of years. Certain places of the mineral is very
rich in silver, some places of Galena may contain as much as 20% silver.
The chemical formula for Galena is PBS. It is made up of lead and sulfur
but it may contain other elements such as silver, Arsenic, Antimony,
and Copper. In the United States galena is found in Kansas , Missouri,
Montana, Oklahoma, Utah and Wisconsin. Small deposits can also be found
in Idaho. It's color is steel- gray and when It is streaked it is also
steel gray. Galena is known for it's perfect cubes, cleavage, softness
and heaviness. It's hardness is 2.5 to 2.75 and it's specific gravity is
7.58. Galena forms many interesting crystal shapes. Galena, freshly cleaved
shows a strong metallic luster, but they can turn somewhat dull after being
exposed to air. The tarnish can be washed off by scrubbing the mineral
with soap and water. It's easily damaged and well formed crystals may break
off into smaller crystals if just put under a little bit of pressure.
Here are two links to other rocks and