Orichalcum or aurichalcum is a

metal A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typicall ...

mentioned in several ancient writings, including the story of Atlantis in the '' Critias'' of

Plato Plato ( ; grc-gre, Πλάτων ; 428/427 or 424/423 – 348/347 BC) was a Greek philosopher born in Athens during the Classical period in Ancient Greece. He founded the Platonist school of thought and the Academy, the first institution ...

. Within the dialogue, Critias (460–403 BC) claims that orichalcum had been considered second only to

gold Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile met ...

in value and had been found and mined in many parts of Atlantis in ancient times, but that by Critias's own time orichalcum was known only by name. Orichalcum may have been a noble metal such as

platinum Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish , a diminutive of "silver". Platinu ...

, as it was supposed to be mined, or one type of

bronze Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals, such as phosphorus, or metalloids such ...

brass Brass is an alloy of copper (Cu) and zinc (Zn), in proportions which can be varied to achieve different mechanical, electrical, and chemical properties. It is a substitutional alloy: atoms of the two constituents may replace each other with ...

or possibly some other metal

alloy An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductility, ...

Overview

The name is derived from the Greek , ' (from , ', mountain and , ', copper), meaning literally "mountain

copper Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkis ...

The Romans transliterated "orichalcum" as "aurichalcum", which was thought to mean literally "gold copper". It is known from the writings of

Cicero Marcus Tullius Cicero ( ; ; 3 January 106 BC – 7 December 43 BC) was a Roman statesman, lawyer, scholar, philosopher, and academic skeptic, who tried to uphold optimate principles during the political crises that led to the estab ...

that the metal which they called orichalcum resembled gold in color but had a much lower value. In

Virgil Publius Vergilius Maro (; traditional dates 15 October 7021 September 19 BC), usually called Virgil or Vergil ( ) in English, was an ancient Roman poet of the Augustan period. He composed three of the most famous poems in Latin literature: t ...

's ''

Aeneid The ''Aeneid'' ( ; la, Aenē̆is or ) is a Latin Epic poetry, epic poem, written by Virgil between 29 and 19 BC, that tells the legendary story of Aeneas, a Troy, Trojan who fled the Trojan_War#Sack_of_Troy, fall of Troy and travelled to ...

'', the breastplate of

Turnus Turnus ( grc, Τυρρηνός, Tyrrhênós) was the legendary King of the Rutuli in Roman history, and the chief antagonist of the hero Aeneas in Virgil's ''Aeneid''. According to the ''Aeneid'', Turnus is the son of Daunus and the nymph Veni ...

is described as "stiff with gold and white orichalc". Orichalcum has been held to be either a

–

, a copper–

tin Tin is a chemical element with the symbol Sn (from la, stannum) and atomic number 50. Tin is a silvery-coloured metal. Tin is soft enough to be cut with little force and a bar of tin can be bent by hand with little effort. When bent, t ...

or copper–

zinc Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodi ...

, or a metal or metallic alloy no longer known. In later years, "orichalcum" was used to describe the sulfide mineral chalcopyrite and also to describe brass. However, these usages are difficult to reconcile with the claims of Plato's Critias, who states that the metal was "only a name" by his time, while brass and chalcopyrite were very important in the time of Plato, as they still are today.

Joseph Needham Noel Joseph Terence Montgomery Needham (; 9 December 1900 – 24 March 1995) was a British biochemist, historian of science and sinologist known for his scientific research and writing on the history of Chinese science and technology, in ...

notes that Bishop Richard Watson, an eighteenth-century professor of chemistry, wrote of an ancient idea that there were "two sorts of brass or orichalcum". Needham also suggests that the Greeks may not have known how orichalcum was made, and that they might even have had an imitation of the original. In 2015, 39 ingots believed to be orichalcum were discovered in a sunken vessel on the coasts of Gela in Sicily which have tentatively been dated at 2,600 years old. They were analyzed with X-ray fluorescence by Dario Panetta of

Technologies for Quality Technology is the application of knowledge to reach practical goals in a specifiable and reproducible way. The word ''technology'' may also mean the product of such an endeavor. The use of technology is widely prevalent in medicine, science, ...

and turned out to be an alloy consisting of 75–80% copper, 15–20% zinc, and smaller percentages of nickel, lead, and iron. Another cache of 47 ingots were recovered in February 2016 and found to have similar composition as measured with

ICP-OES Inductively coupled plasma atomic emission spectroscopy (ICP-AES), also referred to as inductively coupled plasma optical emission spectroscopy (ICP-OES), is an analytical technique used for the detection of chemical elements. It is a type of emiss ...

and ICP-MS: around 65–80% copper, 15–25% zinc, 4-7% lead, 0.5-1% nickel, and trace amounts of Ni, Ag, Sb, As, Bi and other elements.

Ancient literature

Orichalcum is first mentioned in the 7th century BC by

Hesiod Hesiod (; grc-gre, Ἡσίοδος ''Hēsíodos'') was an ancient Greek poet generally thought to have been active between 750 and 650 BC, around the same time as Homer. He is generally regarded by western authors as 'the first written poet i ...

, and in the

Homeric hymn The ''Homeric Hymns'' () are a collection of thirty-three anonymous ancient Greek hymns celebrating individual gods. The hymns are "Homeric" in the sense that they employ the same epic meter—dactylic hexameter—as the ''Iliad'' and ''Odyssey'', ...

dedicated to

Aphrodite Aphrodite ( ; grc-gre, Ἀφροδίτη, Aphrodítē; , , ) is an ancient Greek goddess associated with love, lust, beauty, pleasure, passion, and procreation. She was syncretized with the Roman goddess . Aphrodite's major symbols include ...

, dated to the 630s. According to the '' Critias'' of

, the inner wall surrounding the citadel of Atlantis with the Temple of Poseidon "flashed with the red light of orichalcum". The interior walls, pillars and floors of the temple were completely covered in orichalcum, and the roof was variegated with gold, silver, and orichalcum. In the center of the temple stood a pillar of orichalcum, on which the laws of Poseidon and records of the first son princes of Poseidon were inscribed.

Pliny the Elder Gaius Plinius Secundus (AD 23/2479), called Pliny the Elder (), was a Roman author, naturalist and natural philosopher, and naval and army commander of the early Roman Empire, and a friend of the emperor Vespasian. He wrote the encyclopedic '' ...

points out that orichalcum had lost currency due to the mines being exhausted.

Pseudo-Aristotle Pseudo-Aristotle is a general cognomen for authors of philosophical or medical treatises who attributed their work to the Greek philosopher Aristotle, or whose work was later attributed to him by others. Such falsely attributed works are known as ps ...

in ''De mirabilibus auscultationibus'' (62) describes a type of copper that is "very shiny and white, not because there is tin mixed with it, but because some earth is combined and molten with it." This might be a reference to orichalcum obtained during the smelting of copper with the addition of " cadmia", a kind of earth formerly found on the shores of the Black Sea, which is attributed to be zinc oxide.

Numismatics

numismatics Numismatics is the study or collection of currency, including coins, tokens, paper money, medals and related objects. Specialists, known as numismatists, are often characterized as students or collectors of coins, but the discipline also includ ...

, the term "orichalcum" is used to refer to the golden-colored

used for the

sestertius The ''sestertius'' (plural ''sestertii''), or sesterce (plural sesterces), was an Ancient Rome, ancient Roman Roman currency, coin. During the Roman Republic it was a small, silver coin issued only on rare occasions. During the Roman Empire it w ...

and dupondius coins. It is considered more valuable than copper, of which the ''as'' coin was made.

References

External links

* {{Greek religion, state=collapsed Atlantis Coins of ancient Rome Precious metal alloys Mythological substances Ancient Greek metalwork el:Ορείχαλκος

Overview

Ancient literature

Numismatics

See also

References

External links