When was silver discontinued in coins?

Answer 1

1964 was the last year for general circulation 90% silver quarters. 40% silver quarters were struck for collectors for a special silver bicentennial set, and bear the date 1776-1976, keep in mind nearly all Bicentennial quarters are not silver. If you find it in circulation, it is not silver. All silver Bicentennial quarters have the "S" mintmark (though not all "S" mintmark bicentennial quarters are silver) if your Bicentennial quarter has no mintmark or a "D" mintmark, it is 100% certain it is not silver and is only worth 25 cents. Silver proof sets have been on sale from 1992 to present and are struck in 90% silver. Keep in mind that only the silver proof sets are struck in silver, normal proof sets are copper-nickel clad like circulation issues.

Answer 2

1968

Answer 3

1964