Hi, @oladele-art .
US constitutional silver coins are circulated U.S. dimes, quarters, half dollars, and dollars minted before 1965 (mostly 90% silver) or in the mid-60s (40% silver), valued for their intrinsic silver content rather than collector value, making them an affordable way to buy silver bullion. They're called "constitutional" because they were once official currency, often with low premiums over the silver price. Source