If you buy only one book on any subject of jewellery, this one
is the one to get. frugal or not it's worth every penny. The
titile is Jewellery Concepts and Technology, by Oppi Untracht.
It costs about $100.oo american. If you get this you will never
need another book on any subject. It's like an encyclopeadia and
technical book all in one. And the pictures are to die for.