Hello, firstly I would like to know your budget. For costume jewelry, can be of different quality and I don’t quite understand which site you may want to know. I often buy jewelry on the Internet and I have a lot of experience in this, and the supply of similar sites is even larger. I will try to get into your budget and recommend you the approriate site for mens diamond pendant . I myself bought many costume jewelry collections more than once from Itshot and in theory, it should a good one to suit you.