Chalcopyrite Chalcopyrite Chalcopyrite ( ) is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has the chemical formula CuFeS. It has a brassy to golden yellow color and a hardness of 3.5 to 4 on the Mohs scale. Its streak is diagnostic as green tinged black. On exposure to air, chalcopyrite oxidises to a variety of oxides, hydroxides and sulfates. Associated copper minerals include the sulfides bornite (CuFeS), chalcocite (CuS), covellite (CuS), digenite (CuS); carbonates such as malachite and azurite, and rarely oxides such as cuprite (CuO). Chalcopyrite is rarely found in association with native copper. Natural
Ore railway station adjacent to the Marshlink line as far as Ore Tunnel. Ore is also the start of the single track section on the Marshlink line, which runs through to Appledore. Ore railway station Ore railway station serves Ore Valley in East Sussex, England. It is on the Marshlink Line, and train services are provided by Southern, with a few peak services operated by Southeastern. Third rail 750 V DC electrification from Hastings ends here. The station opened in 1888 and was electrified in 1935. Ore station is the terminus for electric East Coastway services. Trains run regularly to and beyond (the