1.- "Paraiba"-type copper-bearing tourmaline from Brazil, Nigeria, and Mozambique; chemical fingerprinting by LA-ICP-MS Gemological Institute of America; Santa Monica, CA; USA; United States, 2006 Ver registro 2.- Copper-bearing tourmalines from new deposits in Paraiba State, Brazil Gemological Institute of America; Santa Monica, CA; USA; United States, 2007 Ver registro
