Rand Refinery Rand Refinery Rand Refinery (Pty) Limited is the largest integrated single-site precious metals refining and smelting complex in the world. It was established in 1920 to refine gold within South Africa which until that time had been refined in London. Since its inception it has refined nearly 50,000 tonnes of gold. This represents some 30% of all the gold mined in the world since antiquity. It was established in 1920 in Germiston, South Africa, by the Chamber of Mines of South Africa to refine all the gold produced by South Africa's gold mines instead of in London. As of 1919,
Optimum currency area Optimum currency area In economics, an optimum currency area (OCA), also known as an optimal currency region (OCR), is a geographical region in which it would maximize economic efficiency to have the entire region share a single currency. The underlying theory describes the optimal characteristics for the merger of currencies or the creation of a new currency. The theory is used often to argue whether or not a certain region is ready to become a currency union, one of the final stages in economic integration. An optimal currency area is often larger than a country. For instance, part of the