From The Collaborative International Dictionary of English v.0.48 :
Silvern \Sil"vern\, a. [AS. seolfern, sylfren.] Made of silver. [Archaic.] --Wyclif (Acts xix. 24). [1913 Webster] Speech is silvern; silence is golden. --Old Proverb. [1913 Webster]From WordNet (r) 3.0 (2006) :
silvern adj 1: resembling or reminiscent of silver; "a soft silvern voice"; "singing in her silvery tones" [syn: silvern, silvery] 2: 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" [syn: silver, silvern, silvery]