It is also known as pink gold and red gold.

In the 16th century these stones had become known as "black gold".

Then, gold was known as gold, and long slow stories could be told.

No wonder, then, that prisons were known as 'gray gold.'

It has also been produced artificially, and is often known as green gold.

Salt was very valuable at that time and, consequently, was sometimes known as "white gold."

The colors are traditionally known as black and gold, but the color can generally be perceived as yellow.

The station played two current hits per hour known as "future gold".

So prized was this hard but delicate material that it was known as "white gold."

Until recently, only holders of what are known as "gold" or "preferred" credit cards qualfied for these plans.