goldmine

[argey]

a good source of something that is desired

[Dave Paprocki]

Goldmine is a song co-written, co-produced and performed by New Zealand recording artist Kimbra, issued as the third single from her second studio album The Golden Echo.

[Sommer]

A goldmine is a location, site or place where gold is obtained by mining operations, often through digging into the earth or rock. It can also be metaphorically used to refer to any source of abundant or profitable business or wealth.