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]