Golden Dollar's overall composition:
Manganese brass composition:
There's a list of all coin specifications at the U.S. Mint site:
903 fine silver (90.3% silver, 9.7% copper).
lebbo coin metal.
90% silver, 10% copper. That composition was used in quarters dated up till 1964.
The idea is being discussed, but there are no set plans at the moment to make any changes. Save for a few years during WWII, the metal composition has been the same since the coin was first introduced back in 1866 - an alloy of 25% nickel and 75% copper.
Sacagawea is on the US $1 coin.
The first year of issue for the Sacagawea dollar was in 2000.
The coin is a Sacagawea dollar.
They are not rare.
There's a list of all coin specifications at the U.S. Mint site:
The first Sacagawea dollars were struck in 2000.
2000
The nickel, named for the metal that makes up part of its composition.
903 fine silver (90.3% silver, 9.7% copper).
A USSR (СССР) 1933 1 Kopek (КОПЕЕК) coin, was made from an aluminum and bronze alloy.
The name is Sacagawea, and it contains 88.5% copper, 6% zinc, 3.5% manganese, and 2% nickel.
Sacagawea