I am looking to buy a diamond, have it set, appraised, and insured. I live in New York. I have been doing research through books and on the web for a few months, and have looked at rings with the recipient to understand what she wants. Since I work a lot and don't have a car, in all likelihood all transactions will take place within the confines of Manhattan. I am looking for additional insight on the following topics:1. A list of reputable diamond vendors in Manhattan or alternatively, a resource to find reputable dealers in Manhattan.2. How to find/determine a jeweler to create a setting. I am interested in platinum with side stones. I am very particular and have not liked most of the settings I have seen. Does it make sense to buy the stone from a jeweler who also has settings that I like?3. The process and sequence of purchasing a stone, a setting, receiving an appraisal, and securing insurance.4. How to find a good appraiser and insurer.I know this post is a little long and demanding but I need all the help I can get. Thanks in advance for any assistance.