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Gold, silver and bronze or copper were the principal coinage metals of the ancient world, the medieval period and into the late modern period when the diversity of coinage metals increased. Coins are often made from more than one metal, either using alloys, coatings (cladding/plating) or bimetallic configurations. While coins are primarily made ...
The other metals discovered before the Scientific Revolution largely fit the pattern, except for high-melting platinum: Bismuth melts at 272 °C (521 °F) [21] Zinc melts at 420 °C (787 °F), [21] but importantly boils at 907 °C (1665 °F), a temperature below the melting point of silver. Consequently, at the temperatures needed to reduce ...
Other countries that have minted commemorative platinum coins include Bulgaria, [10] Congo, [11] Panama, [12] South Africa, Portugal and France. [13] The Estonian issue began on 24 February 2008 – Independence Day – and included silver, gold and platinum coins. The platinum coin was a first for Estonia.
In 2012, the Perth Mint produced a 1-tonne coin of 99.99% pure gold with a face value of $1 million AUD, making it the largest minted coin in the world with a gold value of around $50 million AUD. [2] China has produced coins in very limited quantities (less than 20 pieces minted) that exceed 8 kilograms (260 ozt) of gold.
American Platinum Eagle, the official platinum bullion coin of the United States. Investment in platinum is often compared in financial history to gold and silver, which were both known to be used as money in ancient civilizations. Experts posit that platinum is about 15–20 times scarcer than gold and approximately 60–100 times scarcer than ...
More recently, it added silver coins, which sold for $675. Now, platinum joins the lineup with its Swiss-made bars engraved with an image of Lady Fortuna, the Roman goddess of fortune and prosperity.
Under United States law, coins that do not meet the legal tender requirement cannot be marketed as "coins". Instead, they must be advertised as rounds. [3] Bullion coins are typically available in various weights, usually multiples or fractions of 1 troy ounce, but some bullion coins are produced in very limited quantities in kilograms or heavier.
Fewer than 1,800 of these coins were ever produced, and one expert puts the number of remaining coins at between 120 and 130, so it’s quite rare. The coin sold at auction for $12 million in 2022. 2.