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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 ...
Blue gold is an alloy of gold and either gallium or indium. [15] Gold-indium contains 46% gold (about 11 karat) and 54% indium, [ 4 ] forming an intermetallic compound AuIn 2 . While several sources remark this intermetallic to have "a clear blue color", [ 3 ] in fact the effect is slight: AuIn 2 has CIE LAB color coordinates of 79, −3.7, − ...
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 royal symbol stamped on the coin, similar to a seal, was a declaration of the value of the contents in gold, silver or electrum. Herodotus mentioned the innovation of coinage, and standard coinage, made by the Lydians: [1] Coin of Alyattes in electrum, 620-563 BC. Legend Walwel ("Alyattes") in Lydian script.
Crown gold (silver, copper) Electrum (silver) Purple gold (aluminum) Rhodite ; Rose gold (copper) Tumbaga (copper) White gold (nickel, palladium) Indium
A Phoenician silver-gilt bowl from the Walters Art Museum showing a hunting scene, originally discovered in the Tomba Barberini. Phoenician metal bowls are approximately 90 decorated bowls made in the 7th–8th centuries BCE in bronze, silver and gold (often in the form of electrum), found since the mid-19th century in the Eastern Mediterranean and Iraq. [1]
I tried six brands of store-bought tater tots from Sonic, Ore-Ida, Cascadian Farm, McCain, Signature Select, and Alexia Foods to find the best ones.
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 ...