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Electrum was much better for coinage than gold, mostly because it was harder and more durable, but also because techniques for refining gold were not widespread at the time. The gold content of naturally occurring electrum in modern western Anatolia ranges from 70% to 90%, in contrast to the 45–55% of gold in electrum used in ancient Lydian ...
The gold contents of all deposits averages 0.41 g/t Au, with the majority of worldwide deposits averaging less than 1 g/t Au. [2] The occurrence of native gold mineralization. Example from Kalgoorlie Australia. The contents of gold can appear in three different forms in these deposits: [2] Native gold; Electrum; Gold–bismuth–antimony ...
Gold quality was increased at the surface by 80–95% gold compared to 64–75% gold at the interior found in Nahal Qanah Cave dated to the 4th millennium BC. Further evidence is from three gold chisels from the 3rd Millennium BC royal cemetery at Ur that had a surface of high gold (83%), low silver (9%) and copper (8%) compared with an ...
The Jenkins-Lewis, Group VII electrum was produced around 270 BC and has the same weight (7.2 g), gold content (45%) and imagery as Group VI, but a "more formal" style. There are no sub-groups and no smaller denominations. [34] [42] Jenkins-Lewis, Group IX is a pure gold issue in two denominations, one weighing 12.5 g and the other weighing 25 ...
Gold occurs principally as a native metal, i.e., gold itself.Sometimes it is alloyed to a greater or lesser extent with silver, which is called electrum.Native gold can occur as sizeable nuggets, as fine grains or flakes in alluvial deposits, or as grains or microscopic particles (known as colour) embedded in rock minerals.
Soon after however, the gold coins were struck in a lighter standard of 8.1 grams. [1] The modification of the weight may have been the result of a policy to exchange and remove all electrum coins in circulation with the heavier format, the 10.7 grams corresponding to the nominal weight of gold in a standard 14.1 grams electrum stater (about 70 ...
Silver and gold coins are the most common and universally recognized throughout history, even today. Mints around the world still make millions of gold and silver coins, including the Canadian Silver Maple Leaf, the American Gold Eagle, and the Australian Nugget. Copper, nickel, and other metals are also common, but in lower denominations.
The team of archaeologists noticed that the helmet was not part of a gold treasure or grave but it was part of a local Geto-Dacian La Tène settlement. [5] Archaeologists concluded that the helmet was a stray find, as only a few late Hallstatt pottery fragments were found, some of them wheeled.