|
ORES An Ore is an economic entity, not a physical one. It is defined by the presence of an economically valuable concentration of some material. However, times and markets change. Today's waste may be tomorrow's gold mine (or perhaps silver mine - exactly what happened to the waste from one region's gold mines). Ores too dilute to be mined may become valuable as technology changes. For example, there are huge copper mines which recover copper from ore of only 3% copper, not feasible a hundred years ago. |
Copyright ©1995-2009 by Amethyst Galleries, Inc.
Site design & programming by galleries.com web services
