Here is an example of how to use pay dirt from Cambridge's online dictionary: Gold rushes continued into the 19th century as lucky prospectors struck pay dirt.
A trail was made through it about the time of the Mono gold excitement, in the year 1858, by adventurous miners and prospectors-men who would build a trail down the throat of darkest Erebus on the way to gold.
Next, in Peru, researchers have used acoustic, prospecting, and ground-penetrating radar to find secret tunnels known as chincanas under the city of Cusco.
Through his contacts in the German and Dutch banking industries, Beit was the financial powerhouse behind the rise of the Kimberley Central Diamond Mining Company, owned by the flamboyant prospector Barney Barnato.
Since living conditions were so squalid, the prospectors frequently slept many men to a tent – and so Rhodes would bunk up with future Members of the Cape Colony Parliament, future Cabinet members and future Prime Ministers.