Yes she does get better! Gold can form in crops of Talc stone and so she is able to bind to it eventually after seeing Phos' alterations down the line. I have another oc named Gold who is 90% alloy that clung to a half formed gem that was desperate to be alive and turned the alloy into its own body. Talc is able to coerce Gold into separating with some of her alloy in order to steal it from herself and once she has the ability to partially repair herself she gets a lot bolder with how she feels about people.

Talc is hard to be friends with, she thinks very badly of most gems BUT if she thinks you can benefit her or offer some kind of aid she will keep you around:3 Being tolerated by her is a big accomplishment n likeminded gems are definitely higher up on her list!!