Sweetwater Mine (Milliken Mine; Frank R. Milliken; Blair Creek; Ozark Lead Company Mine; Adair Creek; Logan Creek), Ellington, Viburnum Trend District, Reynolds Co., Missouri, USA

PbS

Crystal System: cubic
Colour: lead-grey
Lustre: metallic, dull
Habitus: cubic
Hardness: 2½
Fracture: sub-conchoidal
Cleavage: perfect {100}
Density:  7.57 g/cm³ 
Origin and geological occurrence: galena is the primary ore mineral of lead. It is found in ore veins with others sulfides (like sphalerite, pyrite, chalcopyrite), in skarns and in sedimentary rocks where it may replace carbonate beds or be deposited in pore spaces.

www.mindat.org
Smorf link

Samples:

	2.7 Galena Anhedral to subhedral crystals in baryte.  #sulfides
	2.8 Galena Massive galena, with {100} cleavage surfaces, associated with minor sphalerite.  #sulfides
	2.22 Galena Massive galena. #economic minerals
	2.27 Galena Massive galena, with {100} cleavage surfaces.  #sulfides
	2.28 Galena Subhedral crystals with {100} cleavage surfaces associated with quartz and pyrite.  #sulfides