S.A.
I don't think it would be easy or cheap to find anything safe for her to ingest if she bites it off her nails. I say she's 19 months old, let her be a baby and look like one for as long as possible. As the mom of a 7 year-old (going on 16) year-old who is all of a sudden obsessed with fashion and accessories, you'll have plenty of time for all that stuff.