The city has the only mined opal deposit in South America.
Opals were discovered here in 1930 by a man who was washing a cassava for his lunch.
The strange stone was sent to Teresina where it was identified as an opal.
The municipality contains part of the 1,592,550 hectares (3,935,300 acres) Serra da Ibiapaba Environmental Protection Area, created in 1996.
This Piauí, Brazil location article is a stub.