 Out of El Mochito's profits, Rosario made successful investments in new projects in the United States, Canada, Mexico, Peru, Nicaragua, and the Dominican Republic, as well as major Canadian gas discovery in 1969 and 1970s oil play in the British North Sea.From these projects flowed a cornucopia of gold, silver, copper, lead, zinc, mercury, granite, limestone, and petroleum.These properties, largely developed internally, multiplied the value of the company many times from 1954 through 1980, when Rosario was acquired by AMAX, Inc.