Janpath, Sarojini Nagar, Lajpat Nagar
Janpath, sarojini and lajpat are best for junk jewellery shopping.
Myntra, Sarojini , Lajpat , Janpath and Krishna Nagar .
You can easily find it in Janpath
Gujarati lane in janpat (its a bit costly but you can get good stuff there)