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2. Coinage metals - Wikipedia

   en.wikipedia.org/wiki/Coinage_metals

   For example, in India some coins have been made from a stainless steel that contains 82% iron, 18% chromium, and many other countries that have minted coins that contain metals now worth nearly the coin face-value, are experimenting with various steel alloys. Italy had earlier experimented with acmonital, a stainless steel alloy, for its coins ...

3. Coining (mint) - Wikipedia

   en.wikipedia.org/wiki/Coining_(mint)

   Striking a coin refers to pressing an image into the blank metal disc, or planchet, and is a term descended from the days when the dies were struck with hammers to deform the metal into the image of the dies. Modern dies made out of hardened steel are capable of producing many hundreds of thousands of coins before they are retired and defaced.

4. Bullion - Wikipedia

   en.wikipedia.org/wiki/Bullion

   Bullion is non-ferrous metal that has been refined to a high standard of elemental purity. The term is ordinarily applied to bulk metal used in the production of coins and especially to precious metals such as gold and silver. It comes from the Anglo-Norman term for a melting-house where metal was refined, and earlier from French bouillon ...

5. Mint (facility) - Wikipedia

   en.wikipedia.org/wiki/Mint_(facility)

   Ancient coins were made by casting in moulds or by striking between engraved dies. The Romans cast their larger copper coins in clay moulds carrying distinctive markings, not because they knew nothing of striking, but because it was not suitable for such large masses of metal. Casting is now used only by counterfeiters.

6. Billon (alloy) - Wikipedia

   en.wikipedia.org/wiki/Billon_(alloy)

   Billon bawbee coin of James V of Scotland (coined between 1538 and 1543) The use of billon coins dates from ancient Greece and continued through the Middle Ages. During the sixth and fifth centuries BC, some cities on Lesbos used coins made of 60% copper and 40% silver. In both ancient times and the Middle Ages, leaner mixtures were adopted ...

7. 9 Rare American Coins That Are Worth a Lot of Money - AOL

   www.aol.com/finance/9-rare-american-coins-worth...

   The Standing Liberty quarter remains “among the most collectible old coins ever made” by the U.S. Mint, according to Gainesville Coins. The coin’s design made its debut in 1916 but was ...

8. History of coins - Wikipedia

   en.wikipedia.org/wiki/History_of_coins

   Double-die style struck coin from Ancient India, c 304-232 BCE featuring an elephant on one face and a lion on the other. Since that time, coins have been the most universal embodiment of money. These first coins were made of electrum, a naturally occurring pale yellow mixture of gold and silver that was further alloyed with silver and copper.

9. Bi-metallic coin - Wikipedia

   en.wikipedia.org/wiki/Bi-metallic_coin

   As well as circulating coins, where they are generally restricted to high-denomination coins, bi-metallic coins are often used in commemorative issues, often made of precious metals. For example, the only bi-metallic coin issued by the United States is the $10 Library of Congress commemorative, made of a gold ring around a platinum center.