Gold in the optical world

Hello, My name is Charlotte. Like many students -I study
atTechnicum North Antwerp (Belgium)- I have to write a document
. The title of my work is “Gold in the optical world”. Is it
possible to get some about this subject? I would
like to know how the golden frames of eyeglasses are made and how
these are stamped. Ihope you can help me with these
questions. I am also very happy with any other about
my title. Thank you very much. Charlotte Van Imschoot