Tag: pliny the elder

Copper has played an important role in the development of human civilization. Copper was discovered in several sites, and has notable industrial origins in Cyprus whose name comes from those that traded the metal as a commodity. The ancie… Read more »

Magnetite (also magnet iron, magnet iron stone, iron oxide, or iron (II, III) oxide) is the most stable iron oxide with high resistance to acids and alkalis. It has a cubic crystal system and a chemical molecular formula Fe3O4. One of the iro… Read more »