Galena
Golden Mine
Joplin, Missouri


This specimen measures 17 x 11 cm with individual cubes up to 3 cm


Galena      PbS

Lead Sulfide

Color and Luster: Dark lead-gray; metallic

Hardness:2.5

Cleavage: Perfect in three directions, all at 90°

Fracture: Subconchoidal(rare)

Crystals: Isometric; commonly in cubes and combinations of cubes and octahedrons; dodecahedrons less frequent; also massive an din cleavage fragments, coarse or fine grained, fibrous

     

Photo by Mary Sutherland


Descriptions taken from
The Audubon Society Field Guide to North American Rocks and Minerals