"About 60 scheelite localities are now known in the states of Paraiba and Rio Grande do Norte, northeastern Brazil, all of which have been discovered since early 1942, and production in the first 2 1/2 years of the new district has been about 2,500 metric tons of 70 percent WO 3 concentrates. The scheelite occurs in epidote-garnet-quartz tactites developed in calcareous layers interbedded in pre-Cambrian mica schists near granitic intrusions. The area gives promise of becoming one of the world's important sources of tungsten."

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