Dear Pothuri Vidyananda,
Bachelors in Jewellery designing is offered in following
Arch Academy of Design, Jaipur
Indian Diamond Institute, Surat
Raffles Millennium International, Chennai
Its advisable that instead of going in for Bachelors per se, one can consider other long-term options too in jewellery design. There are course which are conducted for a year or two and then require students from 12th background,art background not compulsory.
You can also consider PG courses in jewellery designing.
For more information on colleges you can log on to http://www.youngbuzz.com/colleges-guide
Hope this helps.
Kindly revert for further queries.