NewsFromPolycor Group Changes Top ManagementPatrick Perus steps down as president/CEO after 20 years with world's largest quarrier.MOREIs There Something More to Silicosis Outbreak?Researchers in Tasmania find that problems with engineered stone may go beyond silica content .MOREZimbabwe Seeks Capture of Value-Added RevenueGranite-exporting country want to increase its share when supplying stone.MORE