@MissionsNotPossibleCosImaGhost
Copyright infringement isn't the same thing as making something and passing it off as an original.
It is copying design work and selling it as your own. In the end, a court would need to decide if the work is similar enough and detrimental enough to the original brand; there are guidelines on what would count like material used, shapes, fonts, design points etc.
But, a letter to stop is usually enough to make the person stop without having to go to court. Especially as the woman knows she copied, so being called out on it might stop her. If not, court is an option because if she is copying designs then that is copyright infringement.
Artists, jewellers, designers do it all the time but often the work isn't specific enough. This sounds specific enough.
I've had to do it, I won.