We know why it fooled everybody, but AFAIK the material doesn't have any outstanding properties. With certain impurities and under certain conditions, it: - ha

We know why it fooled everybody, but AFAIK the material doesn't have any outstanding properties. With certain impurities and under certain conditions, it: - has a striking drop in resistivity during a temperature change — a property published in 1951 as a property of copper sulfide - has some ferromagnetic properties — enough to be tipped up in a magnetic field but not to levitate