chalcopyrite - larger student specimens from a skarn in Mexico's Sierra Madre - Unit of 5 student specimens You may have to copy

You may have to copy and paste the link

It has a similar structure to minerals in the serpentine group

since it shows that sand is composed of whatever material is available

is the most common sulfide mineral

" The contrast between upperside and  underside is well illustrated here

chalcopyrite - larger student specimens from a skarn in Mexico's Sierra Madre - Unit of 5 student specimens You may have to copychalcopyrite CuFeS2 El Bolvar Mine Piedras Verdes District, municipality of Uruque, Chihuahua, Mexico The Bolvar Mine is an historic underground copper zinc mine, working a skarn formed during contact metamorphism of carbonate bearing rocks. Located in an area of northwestern Mexico's Sierra Madre that has been mined and prospected for polymetallic copper zinc lead silver and gold deposits since the Spanish colonial period, it produced around three