What are coinage metals?

Historically, most coinage metals (or alloys) are from the three nonradioactive members of group 11 of the periodic table: copper, silver and gold, the copper usually being augmented with tin and often other metals to form bronze. Gold, silver and bronze or copper were the coinage metals of the ancient world, and most medieval coins.

When were coins invented?

Gold, silver and bronze or copper were the coinage metals of the ancient world, and most medieval coins. All western histories of coins begin invention at some time slightly before or after 700 BC, in Aegina Island, [1] or, according to others, in Ephesus, Lydia, 650 BC. [2]

What is a coin checker?

A coin checker is a coin recognition app. It can identify any coin, including the year and mint, from a photo of the front and back of the coin. How does the Coin Checker work? Our coin checker works by leveraging Artificial Intelligence (AI) and Machine Learning (ML) technologies to recognize images.

What are the different denominations of coins?

Today, circulating coins exist in denominations of 1¢ (i.e. 1 cent or $0.01), 5¢, 10¢, 25¢, 50¢, and $1.00. Also minted are bullion (including gold, silver and platinum) and commemorative coins. All of these are produced by the United States Mint.