Elemental Silver Colour
Silver:



Silver sulfide precipitate is black.  You are pobably confusing a precipitate in a test for silver, with actual silver.  The precipitate in a test will be a compound of silver, such as silver sulphide which is black.  

Nanophase metal particles are optically different from bulk in many cases, and can be black, but this doesn't seem to be what the question is referring to.