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Richly endowed wih minerals Guinea possesses over 25 billion tonnes (metrc tonnes)of bauxite- and perhaps up to one-half of the world's reserves. In addition , Guinea' mineral wealth includes more than 4-billion tonnes of high grade iron ore,significant diamond, and gold deposits and undetermeined quantities of uranium.
Joint venture bauxite mining and alumina operations in northwest Guinea historically provide about 80% of Guinea's foreign exchange.
Diamonds and golds are also mined and exported on a large scale.