The name is Sacagawea, and it contains 88.5% copper, 6% zinc, 3.5% manganese, and 2% nickel.
The coin is 90% silver & 10% copper.
It's 80% silver and 20% copper.
$450 to $500 regardless of mint mark, due to its metal content.
90%
zero since Metal Content: 77% copper, 12% zinc, 7% manganese, 4% nickel
Eisenhower was on the dollar coin from 1971 to 1978. J. F. Kennedy is on the half dollar. Whichever one you have, assuming the coin is from circulation it's only worth face value. They're made of copper-nickel, not silver, so they have no precious metal content.
That number indicates the fineness or purity of the metal content. 900 means the coin is 90% of that metal.
About $17. It's a bullion coin sold for its precious metal content rather than for spending. The $1 denomination is artificial.
Seems to be the metal coin content, of the coin.
intrinsic value If a coin had value because of its metal content, you would refer to the "bullion value" or the "melt value" of the coin, as versus the "numismatic value" that a coin which was rare or in exceptional condition would have.
It's not clear what the embossing involves, but in any case it means the coin has been altered and is only worth its metal content, about $7.
Aluminum and Bronze