Egyptian cobalt blue paints and Prussian cobalt oxide necklaces have been ... It is one of only 3 ferromagnetic transition elements along with iron and nickel. As a metal it is very mechanically hard ...
All chemists have their favourite elements, often for some personal reasons. In my case, that would be iron, as I spent three years of a PhD working on iron compounds. But it could also be cobalt, ...
It is no surprise that investors have called the metal "blue gold ... of this argument is the precarious nature of cobalt's supply. It is an element that occurs nowhere on earth in a "free ...