FYI
Out of curiosity I Googled "silver leaf" and hit this site which sells various metal leafs (?):
Here
One thing thing I saw is the imitation gold leaf, mentioned by Cathar in an earlier reply, made of 85% copper and 15% zinc. They also have copper and silver leaf as well, although the copper leaf is not available.
Also found this site
Gold/Silver Leaf that sells gold leaf by the sheet, 3.25" X 3.25" for $5.75 and silver for $16.50 for a book of 25 sheets.
Srill curious.