Former first lady's cousin moves into gemstones
Jose Eduardo Dai, who has long played a key role in the Guebuza family's mining business, is launching a new company to exploit gems in northern Mozambique. [...]
This group of metals used to produce the world's electronic devices - coltan, tin, tantalum, tungsten, cassiterite, tantalite and wolframite - are largely extracted from Africa's Great Lakes region, essentially on the Democratic Republic of Congo side.