Purple became Northwestern's official school color in 1892, replacing black and gold after a university committee thought that the colors were common to too many other universities.

In the post-flu world, technological know-how is going to replace gold as the most perfect medium of exchange.

Purple became Northwestern's official color in 1892, replacing black and gold after a university committee concluded that too many other universities had used these colors.

Aluminium bronze is used to replace gold for the casting of dental crowns.

Copper and gems were still on the list of natural resources, but silver replaced gold.

They stated: "Cultural resources are the raw materials of the city and its value base; its assets replacing coal, steel or gold.

Today, titanium has replaced gold as Louis Cosentino's most precious metal.

In some ways the dollar, as the most widely circulated currency in the world, has replaced gold as a measure of value.

That's why America's markets today have replaced gold as the place many people want to put their money in times of uncertainty.

In the mid to late 1990s, platinum replaced gold as the metal of choice in hip hop fashion.