Nero Orichalcum Semis. NERO CAES AVG IMP, laureate head right / CERTA QVINQ ROM CON, mark of value "S", urn & wreath on table, two griffins on front panel, sheild resting against leg, SC in ex. RIC 247, Cohen 62.
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Orichalcum
A Roman form of brass, used to make certain kinds of ancient coins, such as the sestertius. It can have a very gold-like appearance.
orichalcum - an alloy of copper and zinc, used by the Romans for their sestertii (q.v.).
paludamentum - a Roman military cloak, often worn over the cuirass on the obverse busts on Roman coins.
parazonium - a short sword worn at the waist.
Orichalcum dupondius - 119-121 AD - Rome
Radiate bust / Salus
IMP CAESAR TRAIANVS HADRIANVS AVG PM TRP COS III
SALVS PVBLICA SC ...
Orichalcum
brass, a yellowish alloy of copper and zinc, used extensively during the Imperial period principally for the production of the sestertius and dupondius.
Palladium ...
Nero, Orichalcum Dupondius, 54-66, Lugdunum
NERO CLAVD CAESAR AVG GER P M TR P IMP P P
Laureate head left, globe at point of bust
SECVRITAS-AVGVSTI ...
As - Bronze or orichalcum coins of the Roman republic.
Ask - The lowest current asking price of a particular coin issue and grade offered for sale on a trading network, pricing newsletter, or other medium.
Lower denomination coins, including Asses and Quadrantes, were issued in pure copper, whereas the Sestertius and Dupondius were issued in orichalcum, the name given by numismatists to the alloy of copper and zinc.
This was struck in orichalcum (brass) as was its half, the dupondius. Another metal, copper, was used for the as (one-sixteenth denarius) and its quarter, the quadrans.
The three outer walls of the temple to Poseidon and Cleito were clad respectively with brass, tin, and the third, which encompassed the whole citadel, "flashed with the red light of orichalcum".
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With the coinage reform of Augustus in 23 BC, the sestertius and dupondius were produced in a golden colored alloy of bronze called orichalcum by numismatists, while lower denominations were produced out of reddish copper.
Maximinus I, AD 235-238, AE(Orichalcum) Dupondius. Radiate emperor bust rt./FIDES MILITVM, Fides stands left with 2 standards, Ex. G. Dickey Coll., RIC 79; Cohen 15.
as: (Plural: asses) Bronze or orichalcum coins of the Roman republic.
assay: Analytic test or trial to ascertain the fineness, weight and consistency of precious or other metal in coin or bullion. An assay piece is one that has been assayed.
The dupondius was worth half of a sestertius, and was usually made of "orichalcum," a mustard-yellow brass.
The coinage of Augustus contains two each of gold, silver, and copper coins, but also three of a yellow alloy of copper (orichalcum), which is actually used for the sestertius itself.
 See also: Orichalc, Coin, Bust, Bronze, Struck
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