The Mãe-do-Ouro () is a Brazilian mythological figure primarily known in the folklore of the interior of the Brazilian Southeast, Northeast, and Center-West regions. Depending on the region, this figure takes the form of either a beautiful blonde woman that wears a silk dress or a fireball that has the ability to transform itself into the former. Her appearance is said to indicate areas where gold and precious minerals should not be exploited.

History The origins of the Mãe-do-Ouro date to the 18th century Brazilian Gold Rush.

See also Ball lightning Brown Mountain Lights Hitodama Marfa lights Will-o'-the-wisp

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