Jewelry Wholesale

I just went out of school and wanted to open a small jewelry online shop. However, the problem is that there is no suitable source of accessories for accessories. I want to ask more experienced veterans. It is best to give me good websites and addresses. thanks.

Recently, I want to buy a diamond ring, but I found that there are too many jewelry brands and too similar. What are the differences in quality, price, grade, and after -sales service between them? Or which one is better?