Hi,
You've not mentioned since how long you've been married.Have you or any member of your family have caused harrasement to your wife or any person related to her? Can she (your wife), prove such harassment in the court with any sort of evidence?
Your wife can file a suit of Domestic violence or cruelty agaisnt you or member of your family. However, filing a suit and proving it actually in the court of law, are two different things. In case your wife files an FIR against you or any member of your family, you can immediately approach the court for "anticipatory bail" so that you are not arrested till the decision.
Regarding ornaments gifted to your wife, they are her "Streedhan" and she has every right to claim it even though they have been given by your parents/relative/friends.
My personal advice would be to negotiate the amount and apply for a Mutual Consent Divorce.