Johannesburg Johannesburg Johannesburg (; ; also known as Jozi, Joburg, and eGoli) is the largest city in South Africa and one of the 50 largest urban areas in the world. It is the provincial capital and largest city of Gauteng, which is the wealthiest province in South Africa. While Johannesburg is not one of South Africa's three capital cities, it is the seat of the Constitutional Court. The city is located in the mineral-rich Witwatersrand range of hills and is the centre of large-scale gold and diamond trade. The metropolis is an alpha global city as listed by the Globalization and
Mineral industry of Africa zinc), and Zambia (copper and cobalt). The mineral industry's exports make up an important part of the African gross income. Ongoing mining projects of more than US$1 billion are taking place in South Africa (PGM 69%; gold:31%), Guinea (bauxite and aluminium), Madagascar (nickel), Mozambique (coal), Congo (Kinshasa) and Zambia (cobalt and copper), Nigeria and Sudan (crude petroleum), Senegal (iron), and many others. The Department of Mineral Resources of South Africa reported that investment in newly committed precious metals projects in South Africa—those for which funds had already been committed or were being expended—was $8.26 billion in 2005. An additional $9.56