Coin Encyclopedia
Search and identify coins from around the world — with country, denomination, metal, mint, history, and how to tell them apart.
Caracalla Antoninianus
The first antoninianus coins, introduced by Caracalla in 215 AD as a debased double-denarius identified by the emperor's radiate crown.
Ancient
Faustina the Elder Denarius
Posthumous silver denarius honoring Faustina the Elder, wife of Antoninus Pius, struck for two decades after her death and deification in 140/141 AD.
Ancient
Half Farthing
A tiny copper coin worth one-eighth of a penny, struck mainly for use in colonial Ceylon during the reigns of George IV, William IV, and Victoria.
British
Two Pound Coin
The UK's bimetallic £2 coin, standardized for circulation in the late 1990s, widely used for a rotating series of commemorative reverse designs.
British
Faustina the Younger Denarius
Silver denarius of Faustina the Younger, daughter of Antoninus Pius and wife of Marcus Aurelius, whose coinage emphasizes fertility and family themes.
Ancient
Double Sovereign
A British gold coin worth two pounds, twice the value of the standard sovereign, struck intermittently since the nineteenth century for commemorative and bullion purposes.
British
Maundy Twopence
A small silver twopence struck each year as part of the Royal Maundy set, historically descended from the medieval silver half groat and still distributed in the annual royal alms ceremony.
British
1891 Seated Liberty Quarter
The final year of the long-running Seated Liberty quarter design before it was replaced by the Barber quarter in 1892, popular as an affordable closing-date type coin.
United States
1858 Seated Liberty Quarter
A comparatively plentiful mid-series No Motto Seated Liberty quarter, popular as an affordable entry point for collectors seeking a representative example of the type.
United States
Antoninus Pius Denarius
Silver denarius of Antoninus Pius, whose long, peaceful reign is remembered for stability and prosperity, including coins marking Rome's 900th anniversary.
Ancient
Half Groat
A small hammered silver coin worth half the value of the groat, or two pence, struck across three centuries of English coinage from the reign of Edward III through the Stuart era.
British
1805 Draped Bust Quarter
A far more available date than the famous 1804, the 1805 quarter is a popular representative of the Draped Bust, Heraldic Eagle type for collectors building an early American type set.
United States
Constantine CONSTANTINOPOLIS Commemorative
A small bronze commemorative celebrating the founding of Constantinople, showing Victory standing on a ship's prow on the reverse.
Ancient
1804 Draped Bust Quarter
The key date of the short Draped Bust, Heraldic Eagle quarter series, the 1804 issue had a very small original mintage and ranks among the rarest and most valuable early United States quarters in any condition.
United States
Half Crown
A long-lived British coin worth one-eighth of a pound, struck from the Tudor era until decimalisation in 1970, valued today mainly for its portraits and design variety.
British
Two Pound Gold (Double Sovereign)
A gold coin worth two pounds sterling and roughly twice the weight of a sovereign, struck mainly for jubilees, coronations, and modern proof or bullion sets rather than daily circulation.
British
Valerian Antoninianus
Radiate coin of Valerian, the only Roman emperor ever captured alive by a foreign enemy, taken prisoner by the Sassanid king Shapur I in 260 AD.
Ancient
Classic Head Quarter Eagle
Struck from 1834 to 1839 after Congress reduced the gold weight of U.S. coins, this quarter eagle dropped the motto E PLURIBUS UNUM and features a simplified Liberty head.
United States
Kellogg & Co. Gold Piece
Private gold coinage struck by the San Francisco firm Kellogg & Co. during the California Gold Rush, including the famous octagonal fifty-dollar 'slug' of 1855, filling a shortage of circulating coin.
United States
German Bavaria Thaler
A large silver crown-sized coin issued by the Bavarian state, one of many German territorial thalers struck before German unification.
European
1933 Double Eagle
One of the rarest and most legally contested U.S. coins, struck but never officially released for circulation after the nation left the gold standard; a single example sold for over $18 million.
United States
Panama-Pacific Quarter Eagle Commemorative
A 1915 commemorative gold coin honoring the Panama-Pacific Exposition, showing Liberty riding a hippocampus (sea horse), symbolizing the Panama Canal's linking of the Atlantic and Pacific Oceans.
Commemorative
Diocletian Follis
Large bronze follis of Diocletian, whose sweeping reforms ended the Crisis of the Third Century, established the Tetrarchy, and introduced this new standardized coin denomination in 294 AD.
Ancient
1827 Capped Bust Quarter
One of the most celebrated rarities in American numismatics, the 1827 quarter exists only as extremely rare proof-like Originals and later Restrikes rather than typical circulation coinage.
United States