comedy gold

black gold

Raw petroleum; crude oil.

comedy of errors

A series of amusing or farcical events involving awkward missteps or other mistakes.

cross of gold

A public policy which puts the interests of the rich ahead of those of the poor.

everything one touches turns to gold

Everything someone uses or does succeeds or becomes better.

go for the gold

To attempt to achieve the maximum result or reward in an endeavour.

gold in them thar hills

An opportunity for something to be profitable and/or beneficial.

gold mine

A very profitable economic venture.

heart of gold

A kind, compassionate, or caring attitude; kindheartedness; a person with those qualities.