Coin Encyclopedia
Search and identify coins from around the world — with country, denomination, metal, mint, history, and how to tell them apart.
Korean 5 Yang Silver Dollar (1892)
Korea's first Western-style, dollar-sized silver coin, struck in 1892 with a coiled dragon design as part of King Gojong's currency modernization.
Asian
Third Guinea
A small gold coin worth one-third of a guinea, or seven shillings, struck under George III in the years leading up to the introduction of the modern sovereign.
British
Half Guinea
Smaller companion gold coin to the guinea, worth half its value, struck across the same reigns from Charles II through George III for mid-value transactions.
British
Lysimachos Tetradrachm (Alexander/Athena)
A silver tetradrachm struck by King Lysimachos, one of Alexander the Great's successors, showing the deified Alexander with a ram's horn and a seated Athena on the reverse.
Ancient
2005 Minnesota State Quarter Extra Tree (Doubled Die)
A doubled-die variety of the 2005 Minnesota state quarter that produces the illusion of an extra tree trunk among the treeline in the design, popular with modern variety collectors.
Errors & Varieties
German Prussia 20 Mark Gold
The standard gold coin of Prussia within the newly unified German Empire, featuring successive Prussian kings and forming a key part of the empire's gold mark system.
European
Niue Silver Owl (Athenian)
A modern silver bullion coin issued in the name of Niue, reviving the design of the ancient Athenian owl tetradrachm as a tribute to classical coinage.
Bullion
2000-P Sacagawea/Washington Quarter Mule
An extraordinarily rare mint error pairing the golden Sacagawea dollar obverse with a Washington quarter reverse die, one of the most famous modern mule errors in U.S. coinage.
Errors & Varieties
Austrian Silver Philharmonic
Austria's modern one-ounce silver bullion coin, launched in 2008 as a companion to the long-running gold Philharmonic, featuring the instruments of the Vienna Philharmonic Orchestra.
Bullion
Colombian Peso Silver
Colombia's traditional silver dollar-sized coin, struck across different eras of the country's political evolution, from Nueva Granada through the modern Republic of Colombia.
Latin American
American Silver Eagle
The official one-ounce silver bullion coin of the United States, first struck in 1986, pairing Adolph Weinman's Walking Liberty design with a modern heraldic eagle.
Bullion
Dutch Rijksdaalder
A historic Dutch silver trade coin dating to the Dutch Republic, later continued as a denomination of the Kingdom of the Netherlands.
European
Byzantine Gold Tremissis
A small gold fractional coin worth one-third of a solidus, widely struck across the early Byzantine world and imitated by Germanic successor kingdoms in the former Western Roman Empire.
Ancient
Siamese Rama V Silver Baht
Western-style silver baht introduced under King Chulalongkorn (Rama V) of Siam, replacing centuries-old bullet money with modern flat coinage.
Asian
Demetrios Poliorketes Nike Tetradrachm
A Hellenistic silver tetradrachm of Demetrios I of Macedon, celebrated for its obverse image of Nike standing on a ship's prow, commemorating his naval victory at Salamis in Cyprus.
Ancient
Unite
A gold twenty-shilling coin introduced by James I in 1604 to celebrate the union of the English and Scottish crowns, its name literally symbolizing the joining of the two kingdoms.
British
Japanese 1 Yen Silver Coin
Japan's principal large silver coin of the Meiji era, featuring a coiled dragon, that became a major East Asian trade coin and a symbol of Japan's rapid currency modernization.
Asian
1975 No S Proof Roosevelt Dime
One of the rarest and most valuable modern US coin errors: a 1975 proof dime struck without its San Francisco 'S' mintmark, with only a handful of examples known.
Errors & Varieties
Chinese Dragon Dollar
A coiled dragon dominates the reverse of these late Qing Dynasty silver dollars, struck by numerous Chinese provincial mints as China modernized its coinage using Western minting technology.
Asian
Bactrian Silver Tetradrachm
Large silver coin of the Greco-Bactrian kings of Central Asia, celebrated for producing some of the finest realistic royal portraiture in all of ancient coinage.
Ancient
Egyptian 10 Piastres (silver)
A workhorse silver coin of Khedival, Sultanate, and Kingdom-era Egypt, one-tenth of a pound and commonly found in worn circulated grades from decades of daily use.
Africa & Oceania
British Gold Guinea
Struck from 1663 to 1814 and named for the West African gold used in its earliest issues, the guinea was Britain's leading gold coin and gave its name to a unit of value still referenced today.
British
Japanese Meiji Gold 20 Yen
The largest and highest-denomination gold coin of Meiji-era Japan, featuring an imperial dragon design, struck to underpin Japan's modern gold-backed currency system.
Asian
Armorican Billon Stater
A debased silver-alloy stater struck by Celtic tribes of Armorica (modern Brittany), showing wildly abstracted horse and head designs derived from Greek prototypes.
Ancient