Pedro II, Piauí
Introduction '''Pedro II, Piauí''' is a municipality in the state of Piauí in the Northeast region of Brazil.The municipality contains part of the  Serra da Ibiapaba Environmental Protection Area, created in 1996.
See also *List of municipalities in Piauí*Pedro II (Pedro Segundo), named after Brazil's last Emperor. The city has the only mined opal deposit in South America. A mine in Peru closed a few years ago. 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.
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