ABSTRACT Vivid blue to green copper-bearing tourmalines, known as Paraíba tourmalines, are recovered from deposits in Brazil, Nigeria, and Mozambique. These tourmalines are sought after for their ...

Analysis - Samora Moisés Machel, the first president of independent Mozambique, was born in 1933 in Gaza province, in the south of the country. He died in an unexplained plane crash on 19 October 1986 ...