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[56] [57] The platinum used in such objects was not the pure element, ... Franz Karl Achard made the first platinum crucible in 1784.
The platinum coin was a first for Estonia. Its reverse featured a barn swallow – the national symbol of Estonia – and the obverse showed the national coat of arms. The coin had a face value of 100 Estonian kroons , a platinum purity of 999/1000, a weight of 7.775 grams, [ 14 ] and a diameter of 18.0 mm. [ 15 ] The coin was designed by Tiit ...
Naturally occurring platinum and platinum-rich alloys were known by pre-Columbian Americans for many years. [5] However, even though the metal was used by pre-Columbian peoples, the first European reference to platinum appears in 1557 in the writings of the Italian humanist Julius Caesar Scaliger (1484–1558) as a description of a mysterious metal found in Central American mines between ...
Other precious metals include the platinum group metals: ruthenium, rhodium, palladium, osmium, iridium, and platinum, of which platinum is the most widely traded. [1] The demand for precious metals is driven not only by their practical use but also by their role as investments and a store of value. Historically, precious metals have commanded ...
Platinum, the third precious metal after gold and silver, was discovered in Ecuador during the period 1736 to 1744 by the Spanish astronomer Antonio de Ulloa and his colleague the mathematician Jorge Juan y Santacilia. Ulloa was the first person to write a scientific description of the metal, in 1748.
The first pure nickel coin was the Swiss 20 Rappen of 1881. A book published by the International Nickel Company of Canada in 1933 lists dozens of coins minted out of nickel. Phosphorus: Used in stainless steel alloy Acmonital for the Italian lira coins. [11] Silicon: Used in stainless steel alloy Acmonital for the Italian lira coins. [11] Sulfur
I have a love/hate relationship with the Amex Platinum Card, but its latest welcome bonus, offering up to 175,000 Membership Rewards points after spending $8,000 in the first six months, earns it ...
The measurement of sales of popular music starts high relative to the wedding anniversary scale, concentrating on gold and platinum (see gold album).Likewise, credit card companies usually have a "gold card" and a "platinum card" (many formerly had a "silver card" then followed by a "gold card", but due to similarity in appearance between silver and platinum these were often discontinued with ...