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In 1970, South Africa produced 995 tonnes or 32 million ounces of gold, two-thirds of the world's production of 47.5 million ounces. [2] Production figures are for primary mine production. In the US, for example, for the year 2011, secondary sources (new and old scrap) exceeded primary production. [3]
A miner underground at Pumsaint gold mine, Wales; c. 1938 Landscape of Las Médulas, Spain, the result of hydraulic mining on a vast scale by the Ancient Romans. The exact date that humans first began to mine gold is unknown, but some of the oldest known gold artifacts were found in the Varna Necropolis in Bulgaria.
Gold coins for sale at the Dubai Gold Souk. A gold coin is a coin that is made mostly or entirely of gold.Most gold coins minted since 1800 are 90–92% gold (22‑karat), while most of today's gold bullion coins are pure gold, such as the Britannia, Canadian Maple Leaf, and American Buffalo.
This was the case with all gold certificate series from that point on, with the exception of 1888, 1900, and 1934. The series of 1888 and 1900 were issued to specific payees as before. The series of 1882 had the same portraits as the series of 1875, but a different back design, featuring a series of eagles, as well as complex border work.
Besides placer deposits of gold, and gold bearing quartz in weathered rock, gold also occurs in quartz veins. The most profitable veins, in the Dahlonega District, occur in the contact zone between mica-schists and granite or diorite. [2]: 59–61 The discovery of gold in the Georgia Gold Belt in 1828 led to the Georgia Gold Rush.
Gold, a chemical element; Genomes OnLine Database; Global-scale Observations of the Limb and Disk, a NASA Explorer Mission of Opportunity; GOLD (parser), an open-source parser-generator of BNF-based grammars; Graduates of the Last Decade, an Institute of Electrical and Electronics Engineers program to garner more university level student members
The Spanish gold onza (or 8-escudo coin) was of identical weight to the Spanish dollar but was officially valued at 16 silver pesos, thus putting the peso on a bimetallic standard with a gold/silver ratio of 16. Its divergence with the value of gold in international trade featured prominently in the continued monetary crises of the 19th century.
Gold: the California story. Berkeley and Los Angeles: University of California Press. ISBN 0-520-21547-8. Rawls, James J. and Orsi, Richard J. (eds.) (1999). A golden state: mining and economic development in Gold Rush California (California History Sesquicentennial Series, 2). Berkeley and Los Angeles: University of California Press.