silvern in WordNet English dictionary

1. having the white lustrous sheen of silver
   "a land of silver (or silvern) rivers where the salmon leap"; "repeated scrubbings have given the wood a silvery sheen"
   silver  silvern  silvery 
   
2. resembling or reminiscent of silver
   "a soft silvern voice"; "singing in her silvery tones"
   silvern  silvery