In case you get overwhelmed by the vast collection, below are some tips for buying the best diamond rings online.       Research and Learn The first step is to do a research about the current diamond ring trends and to learn about the 4 C’s of a diamond. Select the qualities that you prefer and study more thoroughly about it. These qualities along with your budget will let you choose the best diamond rings online. Grading Report While buying diamond rings online, make sure that it comes with a grading report such as a GIA certificate. The certificate offers an unbiased analysis of the key qualities of a diamond. Since the value of a diamond is based on its quality, this kind of grading report is really important. Report Check Do not forget to verify the details given on the diamond certificate on Report Check, which is the online database of GIA. Make sure that the grading reports of your sparkler match with the description of the product given on Report Check as well. If you prefer, you can take a printout of the product description too.