Electrum is a naturally occurring

alloy An alloy is a mixture of chemical elements of which in most cases at least one is a metal, metallic element, although it is also sometimes used for mixtures of elements; herein only metallic alloys are described. Metallic alloys often have prop ...

gold Gold is a chemical element; it has chemical symbol Au (from Latin ) and atomic number 79. In its pure form, it is a brightness, bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal ...

and

silver Silver is a chemical element; it has Symbol (chemistry), symbol Ag () and atomic number 47. A soft, whitish-gray, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. ...

, with trace amounts of

copper Copper is a chemical element; it has symbol Cu (from Latin ) 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 pinkish-orang ...

and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. It has been produced artificially and is also known as " green gold".Emsley, John (2003
Nature's building blocks: an A–Z guide to the elements
Oxford University Press. p. 168. . Electrum was used as early as the third millennium BC in the

Old Kingdom of Egypt In ancient Egyptian history, the Old Kingdom is the period spanning –2200 BC. It is also known as the "Age of the Pyramids" or the "Age of the Pyramid Builders", as it encompasses the reigns of the great pyramid-builders of the Fourth Dynasty ...

, sometimes as an exterior coating to the pyramidia atop

ancient Egypt Ancient Egypt () was a cradle of civilization concentrated along the lower reaches of the Nile River in Northeast Africa. It emerged from prehistoric Egypt around 3150BC (according to conventional Egyptian chronology), when Upper and Lower E ...

ian

pyramid A pyramid () is a structure whose visible surfaces are triangular in broad outline and converge toward the top, making the appearance roughly a pyramid in the geometric sense. The base of a pyramid can be of any polygon shape, such as trian ...

s and

obelisk An obelisk (; , diminutive of (') ' spit, nail, pointed pillar') is a tall, slender, tapered monument with four sides and a pyramidal or pyramidion top. Originally constructed by Ancient Egyptians and called ''tekhenu'', the Greeks used th ...

s. It was also used in the making of ancient drinking vessels. The first known metal

coin A coin is a small object, usually round and flat, used primarily as a medium of exchange or legal tender. They are standardized in weight, and produced in large quantities at a mint in order to facilitate trade. They are most often issued by ...

s made were of electrum, dating back to the end of the 7th century or the beginning of the 6th century BC.

Etymology

The name ''electrum'' is the

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

ized form of the

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

word ἤλεκτρον (''ḗlektron''), mentioned in the ''

Odyssey The ''Odyssey'' (; ) is one of two major epics of ancient Greek literature attributed to Homer. It is one of the oldest surviving works of literature and remains popular with modern audiences. Like the ''Iliad'', the ''Odyssey'' is divi ...

'', referring to a metallic substance consisting of

alloyed with

. The same word was also used for the substance

amber Amber is fossilized tree resin. Examples of it have been appreciated for its color and natural beauty since the Neolithic times, and worked as a gemstone since antiquity."Amber" (2004). In Maxine N. Lurie and Marc Mappen (eds.) ''Encyclopedia ...

, likely because of the pale yellow color of certain varieties. (It is from amber’s

electrostatic Electrostatics is a branch of physics that studies slow-moving or stationary electric charges. Since classical times, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word (), mean ...

properties that the modern English words ''

electron The electron (, or in nuclear reactions) is a subatomic particle with a negative one elementary charge, elementary electric charge. It is a fundamental particle that comprises the ordinary matter that makes up the universe, along with up qua ...

'' and ''

electricity Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwel ...

'' are derived.) Electrum was often referred to as "white gold" in ancient times but could be more accurately described as pale gold because it is usually pale yellow or yellowish-white in color. The modern use of the term ''

white gold White gold is an alloy of gold and at least one white metal, usually nickel or palladium. Like yellow gold, the purity of white gold is given in carats (karats). It is often used on jewellery. A common white gold formulation consists of 90% wt ...

'' usually refers to gold alloyed with any one or a combination of

nickel Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slo ...

, silver,

platinum Platinum is a chemical element; it has Symbol (chemistry), symbol Pt and atomic number 78. It is a density, dense, malleable, ductility, ductile, highly unreactive, precious metal, precious, silverish-white transition metal. Its name origina ...

and

palladium Palladium is a chemical element; it has symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1802 by the English chemist William Hyde Wollaston. He named it after the asteroid Pallas (formally 2 Pallas), ...

to produce a silver-colored gold.

Composition

Electrum consists primarily of gold and silver but is sometimes found with traces of platinum, copper and other metals. The name is mostly applied informally to compositions between 20–80% gold and 80–20% silver, but these are strictly called gold or silver depending on the dominant element. Analysis of the composition of electrum in ancient Greek coinage dating from about 600 BC shows that the gold content was about 55.5% in the coinage issued by

Phocaea Phocaea or Phokaia (Ancient Greek language, Ancient Greek: Φώκαια, ''Phókaia''; modern-day Foça in Turkey) was an ancient Ionian Ancient Greece, Greek city on the western coast of Anatolia. Colonies in antiquity, Greek colonists from Phoc ...

. In the early classical period the gold content of electrum ranged from 46% in

Phokaia Phocaea or Phokaia (Ancient Greek: Φώκαια, ''Phókaia''; modern-day Foça in Turkey) was an ancient Ionian Greek city on the western coast of Anatolia. Greek colonists from Phocaea founded the colony of Massalia (modern-day Marseille, in F ...

to 43% in

Mytilene Mytilene (; ) is the capital city, capital of the Greece, Greek island of Lesbos, and its port. It is also the capital and administrative center of the North Aegean Region, and hosts the headquarters of the University of the Aegean. It was fo ...

. In later coinage from these areas, dating to 326 BC, the gold content averaged 40% to 41%. In the

Hellenistic period In classical antiquity, the Hellenistic period covers the time in Greek history after Classical Greece, between the death of Alexander the Great in 323 BC and the death of Cleopatra VII in 30 BC, which was followed by the ascendancy of the R ...

electrum coins with a regularly decreasing proportion of gold were issued by the

Carthaginians The Punic people, usually known as the Carthaginians (and sometimes as Western Phoenicians), were a Semitic people, Semitic people who Phoenician settlement of North Africa, migrated from Phoenicia to the Western Mediterranean during the Iron ...

. In the later

Eastern Roman Empire The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived the events that caused the fall of the Western Roman E ...

controlled from

Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...

, the purity of the gold coinage was reduced.

History

Electrum is mentioned in an account of an expedition sent by Pharaoh

Sahure Sahure (also Sahura, meaning "He who is close to Ra, Re"; died 2477 BC) was a pharaoh, king of ancient Egypt and the second ruler of the Fifth dynasty of Egypt, Fifth Dynasty ( – BC). He reigned for around 13 years in the early 25th&nbs ...

of the Fifth Dynasty of Egypt. It is also discussed by

Pliny the Elder Gaius Plinius Secundus (AD 23/24 79), known in English as Pliny the Elder ( ), was a Roman Empire, Roman author, Natural history, naturalist, and naval and army commander of the early Roman Empire, and a friend of the Roman emperor, emperor Vesp ...

in his ''

Naturalis Historia The ''Natural History'' () is a Latin work by Pliny the Elder. The largest single work to have survived from the Roman Empire to the modern day, the ''Natural History'' compiles information gleaned from other ancient authors. Despite the work' ...

''. It is also mentioned in the Bible, in the first chapter of the book of the prophet

Ezekiel Ezekiel, also spelled Ezechiel (; ; ), was an Israelite priest. The Book of Ezekiel, relating his visions and acts, is named after him. The Abrahamic religions acknowledge Ezekiel as a prophet. According to the narrative, Ezekiel prophesied ...

Early coinage

The earliest known electrum coins, Lydian coins and East Greek coins found under the

Temple of Artemis The Temple of Artemis or Artemision (; ), also known as the Temple of Diana, was a Greek temple dedicated to an ancient, localised form of the goddess Artemis (equated with the Religion in ancient Rome, Roman goddess Diana (mythology), Diana) ...

Ephesus Ephesus (; ; ; may ultimately derive from ) was an Ancient Greece, ancient Greek city on the coast of Ionia, in present-day Selçuk in İzmir Province, Turkey. It was built in the 10th century BC on the site of Apasa, the former Arzawan capital ...

, are currently dated to the last quarter of the 7th century BC (625–600 BC). Electrum is believed to have been used in coins c. 600 BC in

Lydia Lydia (; ) was an Iron Age Monarchy, kingdom situated in western Anatolia, in modern-day Turkey. Later, it became an important province of the Achaemenid Empire and then the Roman Empire. Its capital was Sardis. At some point before 800 BC, ...

during the reign of

Alyattes Alyattes ( Lydian language: ; ; reigned c. 635 – c. 585 BC), sometimes described as Alyattes I, was the fourth king of the Mermnad dynasty in Lydia, the son of Sadyattes, grandson of Ardys, and great-grandson of Gyges. He died after a r ...

. 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 coinage of the same geographical area. This suggests that the Lydians had already solved the refining technology for silver and were adding refined silver to the local native electrum some decades before introducing pure silver coins. In Lydia, electrum was minted into coins weighing , each valued at ''

stater The stater (; ) was an ancient coin used in various regions of Greece. The term is also used for similar coins, imitating Greek staters, minted elsewhere in ancient Europe. History The stater, as a Greek silver currency, first as ingots, and ...

'' (meaning "standard"). Three of these coins—with a weight of about —totaled one stater, about one month's pay for a soldier. To complement the stater, fractions were made: the ''trite'' (third), the ''hekte'' (sixth), and so forth, including of a stater, and even down to and of a stater. The stater was about to . Larger denominations, such as a one stater coin, were minted as well. Because of variation in the composition of electrum, it was difficult to determine the exact worth of each coin. Widespread trading was hampered by this problem, as the intrinsic value of each electrum coin could not be easily determined. This suggests that one reason for the invention of coinage in that area was to increase the profits from

seigniorage Seigniorage , also spelled seignorage or seigneurage (), is the increase in the value of money due to money creation minus the cost of producing the additional money. Monetary seigniorage is where government bonds are exchanged for newly create ...

by issuing currency with a lower gold content than the commonly circulating metal. These difficulties were eliminated circa 570 BC when the

Croeseid The Croeseid, anciently ''Kroiseioi stateres'', was a type of coin, either in gold or silver, which was minted in Sardis by the king of Lydia Croesus (561–546 Before Christ, BC) from around 550 BC. Croesus is credited with issuing the first true ...

s, coins of pure gold and silver, were introduced. However, electrum currency remained common until approximately 350 BC. The simplest reason for this was that, because of the gold content, one 14.1 gram stater was worth as much as ten 14.1 gram silver pieces. File:Ephesos 620-600 BC FANEOS.jpg, Electrum coin from

, 620–600 BC File:Electrum trite, Alyattes II, Lydia, 610-560 BC.jpg, Electrum trite of

Alyattes of Lydia Alyattes (Lydian language: ; ; reigned c. 635 – c. 585 BC), sometimes described as Alyattes I, was the fourth king of the Mermnad dynasty in Lydia, the son of Sadyattes, grandson of Ardys, and great-grandson of Gyges. He died after a re ...

, 610–560 BC File:MYSIA, Kyzikos. Early–mid 4th centuries BC. Portrait of Timotheos.jpg, Electrum coin from

Cyzicus Cyzicus ( ; ; ) was an ancient Greek town in Mysia in Anatolia in the current Balıkesir Province of Turkey. It was located on the shoreward side of the present Kapıdağ Peninsula (the classical Arctonnesus), a tombolo which is said to have or ...

Mysia Mysia (UK , US or ; ; ; ) was a region in the northwest of ancient Asia Minor (Anatolia, Asian part of modern Turkey). It was located on the south coast of the Sea of Marmara. It was bounded by Bithynia on the east, Phrygia on the southeast, Lyd ...

, early–mid 4th century BC File:Statère en électrum de Zeugitane représentant un cheval debout.jpg, Electrum stater,

Carthage Carthage was an ancient city in Northern Africa, on the eastern side of the Lake of Tunis in what is now Tunisia. Carthage was one of the most important trading hubs of the Ancient Mediterranean and one of the most affluent cities of the classic ...

References

External links