I can recommend a school in India. It's called Jewellery Product
Development Centre (JPDC), New Delhi. The website for the school is
www.jpdc-nd.org. There are a few other schools as well mainly in
Delhi and Mumbai and a couple in Jaipur. some of these are: JDTI,
Pearl Academy, Eikon, Ensign, IIJT, IIGJ, Arch school of jewellery
As far as the manufacturing skills are concerned, I am not aware of
the details in these schools other than JPDC, New Delhi. This is
where i ahve studied and also is the school where i now teach.
If you require any other please free to contact.