1989 Congress Half Dollar

Is a 1989 Congress Half Dollar .90 silver? And how about a 1989 Congress Dollar, is that silver also?
And how much would you say one is worth?

 

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coin:
The half dollar is clad (ie not silver)
The dollar is 90% silver.

 

how about the 1 dollar congress commemorative??? Is that 90% silver?

 

yup.