Buenaventura Mining Co (NYSE:BVN) reported quarterly earnings of $0.66 per share which beat the analyst consensus estimate of $0.41 by 60.98 percent. This is a 29.03 percent decrease over earnings of $0.93 per share from the same period last year. The company reported quarterly sales of $431.000 million which beat the analyst consensus estimate of $344.931 million by 24.95 percent. This is a 30.17 percent increase over sales of $331.100 million the same period last year.