What is the origin of the idiom "gold digger" and when to use it?

The phrase is thought to have originated in the 19th century, when it was used to describe women who were attracted to wealthy men for their financial status. It derives from the literal sense of digging for gold, where individuals would search for valuable minerals in the hope of acquiring wealth. This idiom is used to describe someone, typically a woman, who pursues a romantic relationship primarily for financial gain. It implies that the person is more interested in the wealth and material possessions of their partner than in genuine love or emotional connection.