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The Spanish dollar, ... and the escudo at 3.383 grams (0.1193 oz) of 0.875 fine gold. ... the peso was reduced in size and fineness, with further reductions in the ...
Mintage of gold proof coinage [8] [9] [10] Year 1 ⁄ 20 oz 1 ⁄ 10 oz 1 ⁄ 4 oz 1 ⁄ 2 oz 1 oz 1983 88 1989 704 2004 200 200 1,800 200 200 2005 400 400 3,920 720 570 2006 520 520 2,120 520 520 2007 500 500 1,500 500 500 2008 800 2009 600 600 1,700 600 600 2010 1,000 2011 1,100 1,100 2,000 1,100 1,100 2013 300 300 600 300 400 2014 250 250 ...
The gold dollar or gold one-dollar piece is a gold coin that was struck as a regular issue by the United States Bureau of the Mint from 1849 to 1889. The coin had three types over its lifetime, all designed by Mint Chief Engraver James B. Longacre. The Type 1 issue has the smallest diameter (0.5 inch =12.7mm) of any United States coin minted to ...
The first escudo was a gold coin introduced in 1535/1537, with coins denominated in escudos issued until 1833. It was initially worth 16 reales . When different reales were introduced, the escudo became worth 16 reales de plata in 1642, then 16 reales de plata fuerte or 40 reales de vellón from 1737.
Spanish American gold coins were minted in one-half, one, two, four, and eight escudo denominations, with each escudo worth around two Spanish dollars or $2. The two-escudo (or $4 coin) was the "doubloon" or " pistole ", and the large eight-escudo (or $16) was a "quadruple pistole".
The silver-colored Susan B. Anthony dollar was replaced with gold-colored Sacagawea dollar in 2000 and Presidential Dollars 2007-2016; though the composition changed, the coin's size and weight remain the same. Some variances in coin size and weight occurred over time, especially as the value of silver varied.
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Carlin-type gold ore from the Twin Creeks mine, Nevada, near the Getchell Mine. This is an auriferous, silicified-decalcified siltstone/mudstone from the Comus Formation (Lower Ordovician). Ore grade is about 0.20 to 0.25 ounces of gold per ton of rock. The gold mineralization is very finely disseminated: "invisible gold".