galena - teaching student specimens of the primary ore of lead with attached matrix - Talsint (?) Morocco - Unit of 5 specimens

Galena - PbS         

Galena is a very common metallic sulfide. It often occurs in cubic crystals and has good cubic cleavage. It is practically the only source of lead, which is used in huge amounts in storage batteries and in shielding from radioactivity. Galena is the Latin name for lead ore. 

Galena is easily identified by students by its density, metallic luster and its cubic cleavage. Not cleaved into rectangular blocks, though they show cubic cleavage, these larger student specimens are from a vein with some attached quartz or wall rock. Students are often presented with cleanly-cleaved specimens. Challenge them a bit to identify these by density and streak, where the cleavage is not as obvious.

The locality given for these specimens was Talsint, Morocco. We'll accept Morocco, but doubt Talsint as the locality where mined. 

For schools, we pack six.

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