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Bronze disease is the chloride corrosion of cuprous (copper-based) artifacts. It was originally thought to be caused by bacteria. [ 1 ] It is contagious in that the chlorides which cause it can spread the condition if they are brought into contact with another cuprous object. Despite its name, bronze disease can affect any copper-bearing alloy ...
The denarius (Latin: [deːˈnaːriʊs]; pl.: dēnāriī, Latin: [deːˈnaːriiː]) was the standard Roman silver coin from its introduction in the Second Punic War c.211 BC[ 1 ] to the reign of Gordian III (AD 238–244), when it was gradually replaced by the antoninianus.
The antoninianus, introduced in 215 AD, continued the denarius 's slow decline in silver purity. The antoninianus or pre-reform radiate[1] was a coin used during the Roman Empire thought to have been valued at 2 denarii. It was initially silver, but was slowly debased to bronze with a minimal silver content. The coin was introduced by Caracalla ...
Gold, silver and bronze or copper were the principal coinage metals of the ancient world, the medieval period and into the late modern period when the diversity of coinage metals increased. Coins are often made from more than one metal, either using alloys, coatings (cladding / plating) or bimetallic configurations.
This hoard, weighing over 1,300 pounds and containing more than 50,000 bronze coins from the late third and early fourth centuries AD, was concealed with bricks and ceramic filler.
The penny of Great Britain and the United Kingdom from 1714 to 1901, the period in which the House of Hanover reigned, saw the transformation of the penny from a little-used small silver coin to the bronze piece recognisable to modern-day Britons. All bear the portrait of the monarch on the obverse; copper and bronze pennies have a depiction of ...
The Frome Hoard is a hoard of 52,503 Roman coins found in April 2010, by metal detectorist Dave Crisp near Frome in Somerset, England. [ 1 ] The coins were contained in a ceramic pot 45 cm (18 in) in diameter, [ 2 ] and date from AD 253 to 305. Most of the coins are made from debased silver or bronze. [ 1 ]
The first group of these coins reviewed by numismatists were 10 silver pieces and one bronze piece found in the mid-nineteenth century. [3] By 1881 the number of coins had grown to 43, [3] and many more have been found since. [4] These coins were first attributed to Bar Kokhba by Moritz Abraham Levy in 1862 and Frederic Madden in 1864. [3]