Copper-bearing tourmalines from new deposits in Paraíba State, Brazil

Abstract

Two new deposits of Cu-bearing tourmaline have been found in Paraíba State, Brazil, not far from the original source at Mina da Batalha. The Glorious mine has produced a limited amount of gem-quality material with a composition that is similar to the tourmaline from Mina da Batalha. Initial work at the second locality, known as Mineração Batalha, has not yet produced any gem-quality material. © 2007 Gemological Institute of America.