Coin Encyclopedia
Search and identify coins from around the world — with country, denomination, metal, mint, history, and how to tell them apart.
2012 London Olympics 50p Series
The Royal Mint issued 29 different circulating 50 pence coins in 2011, each honoring a different sport of the London 2012 Olympic and Paralympic Games, sparking a nationwide coin-collecting craze in Britain.
Commemorative
2000 Sydney Olympics Coin Series
The Royal Australian Mint issued one of the largest circulating commemorative coin programs ever produced for a single Olympics, featuring numerous $5 designs alongside premium silver and gold proof coins for the Sydney 2000 Games.
Commemorative
1823/2 Capped Bust Quarter Overdate
One of the rarest die varieties in the entire United States quarter series, the 1823/2 overdate shows a 3 punched over a leftover 2, from an extremely limited production run.
Errors & Varieties
1917 Type 2 Standing Liberty Quarter
The revised Standing Liberty quarter design introduced later in 1917, adding chain mail over Liberty's chest and extra stars on the reverse, used through the end of the series in 1930.
United States
Spanish 20 Pesetas Gold (Alfonso XII)
Spain's standard gold coin of the Latin Monetary Union era, struck under King Alfonso XII following the restoration of the Spanish monarchy in the 1870s.
European
2004 Wisconsin State Quarter Extra Leaf
A famous modern variety of the 2004 Wisconsin state quarter showing an unexplained extra leaf on the corn cob, found in both 'low leaf' and 'high leaf' forms.
Errors & Varieties
2004-D Wisconsin Extra Leaf High Quarter
The 'high leaf' variant of the famous Wisconsin quarter extra-leaf variety, showing the anomalous extra corn leaf pointing upward and outward rather than low near the cheese wheel.
Errors & Varieties
Italian 20 Lire Gold (Vittorio Emanuele)
The Kingdom of Italy's standard 20 lire gold coin, issued under kings including Vittorio Emanuele II, sharing the Latin Monetary Union's gold specifications with coins like the French Napoleon.
European
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
2008 Beijing Olympics Commemorative Coins
China issued a large multi-year coin program ahead of the 2008 Beijing Olympics, spanning circulating 1 Yuan pieces and extensive gold and silver proof series depicting Olympic sports and Beijing landmarks.
Commemorative
2011 Gettysburg America the Beautiful Quarter
An America the Beautiful Quarters release honoring Gettysburg National Military Park in Pennsylvania, site of the pivotal 1863 Civil War battle.
United States
2021 Tuskegee Airmen America the Beautiful Quarter
A 2021 America the Beautiful Quarter honoring the Tuskegee Airmen, the pioneering African American military pilots of World War II, at their Alabama training site.
United States
2010 Hot Springs America the Beautiful Quarter
The first coin in the America the Beautiful Quarters series, honoring Hot Springs National Park in Arkansas with an image of its historic bathhouse row.
United States
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
Aureus of Augustus
The gold coin of Rome's first emperor, Augustus, who standardized the aureus at roughly 1/40 of a Roman pound and set the gold standard for the empire.
Ancient
Roman Aureus of Augustus
A gold coin struck under Rome's first emperor, Augustus, marking the establishment of a stable imperial gold coinage that funded and symbolized the new Roman Empire.
Ancient
Ides of March Denarius (EID MAR)
A denarius struck by Brutus in 42 BC commemorating Julius Caesar's assassination, showing daggers and a liberty cap — one of the most famous and valuable ancient coins ever made.
Ancient
Philip the Arab Antoninianus
Radiate coin of Philip the Arab, notable for celebrating Rome's 1,000th anniversary in 248 AD with a memorable series of animal-themed 'Saecular Games' reverse types.
Ancient
New Zealand Half Crown (pre-decimal)
The largest denomination in New Zealand's regular pre-decimal coin series, featuring the national coat of arms, circulated from 1933 until decimalization in 1967.
Africa & Oceania
South African Silver Krugerrand
The silver version of the world-famous Krugerrand, launched in 2017 to mark the gold coin's 50th anniversary, using the same Kruger and springbok design.
Bullion
Netherlands Rijksdaalder Gulden
The 2.5 guilder coin of the Kingdom of the Netherlands, carrying forward the historic rijksdaalder name through the monarchy era until the euro's adoption.
European
Saxony Thaler
Saxony was one of the earliest and most prolific issuers of thalers, with the electorate and later kingdom producing large silver coins from the 16th century until German unification.
European
Theodosius I Solidus
A gold solidus of Theodosius I, the last emperor to rule a united Roman Empire and the ruler who made Nicene Christianity the state religion.
Ancient
Severus Alexander Denarius
Silver denarius of the teenage emperor Severus Alexander, last ruler of the Severan dynasty, whose reign closed with growing military unrest before his murder in 235 AD.
Ancient