Villamanínite is a copper sulfide mineral with small amounts of other elements, belonging to group II according to the Strunz classification.

[3] The English researchers who identified it gave it the name of villamaninite when they confused the municipality in which the mine was actually located, because Villamanín is where the ore was loaded onto the railroad for export.

[4] Villamanínite appears in the Providencia mine in two habits: either as crystals, rough in general, cubic, cuboctahedral or octahedral, usually less than 1 mm, or as fibroradiated nodules up to 1 cm in diameter.

The Providencia mine is located 2.3 km west of the town of Villanueva de Pontedo, and was initially exploited between 1906 and 1914.

[5] Although the presence of villamanínite has also been reported in about a dozen sites around the world, the Providencia mine so far remains the only place where samples visible to the naked eye can be obtained.