Vermeil wire source and plating question

I have 2 questions:

1.I’ve heard of “vermeil” wire, does it exist and if so does anyone
have a source?

  1. Re: plating. I make hand made silver chains and want to have
    them plated to vermeil. If I send finished work out to be plated what
    are the limitations? Eg: a hand made chain with semi precious beads
    or glass. Will all areas of the chain get plated or will any overlap
    remain silver? Will the gems remain unplated-my understanding is yes,
    but what if there is some metal content in the beads , say I use a
    mineral that may have metal in it.

Robin Wagner