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From Wikipedia:
Sphalerite is a sulfidemineral with the chemicalformula (Zn,Fe)S.It is the most important ore of zinc.
Sphalerite is found in a variety of deposit types, but it isprimarily in sedimentaryexhalative, Mississippi-Valleytype,
and volcanogenicmassive sulfide deposits.
It is found in association with galena,chalcopyrite,pyrite (and othersulfides),calcite,dolomite,quartz,rhodochrosite,and fluorite.
German geologist ErnstFriedrich Glocker discovered sphalerite in 1847, naming it basedon the Greek word sphaleros,
meaning "deceiving",due to the difficulty of identifying the mineral. Back in 1847, he must have been clever!
In addition to zinc, sphalerite is an ore of cadmium,gallium,germanium, andindium.
From Wikipedia:
Galena, alsoknown as lead glance, is the primary ore mineral of lead, a naturallyoccurring lead sulfide (PbS).
It's a significant source of silver aswell and is one of the most abundant sulfide minerals.
Galena istypically found in a cubic crystal system, often displayingoctahedral forms,and has a metallic,lead-gray luster.
From Wikipedia:
Chalcopyrite is a copperironsulfidemineral and the most abundant copperore mineral.
It has the chemicalformula CuFeS2 and crystallizes in the tetragonalsystem.
It has a brassyto golden yellow color and a hardnessof 3.5 to 4 on the Mohsscale.
Its streakis diagnostic as green-tinged black.
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