Dims: 5.0" x 4.8" x 2.4"(12.7 x 12.2 x 6.1 cm)
Wt: 2 lbs., 4.2 oz.(1.029 kg)
Sweetwater Mine, Reynolds County, Missouri, U.S.A.
A few large, cubic Galena crystals rest on a bed of tiny ones mixed with dolomite and chalcopyrite crystals on this specimen. They are, of course, opaque and have the standard dark gray color and metallic luster of the mineral. All of the crystals are intergrown, creating a large, rectangular chunk; two of them are of nearly equal size and have grown slightly askew, so that their faces are almost but not quite parallel to each other. The tiny Galenas occur in the octahedral form with their points truncated by small secondary faces. The dolomite crystals occur as tiny white rhombohedrons, and the chalcopyrite crystals occur as disphenoid prisms. All of this rests on a large, dirty matrix of dolomitic limestone.