Article By: GIA (Gemological Institute of America) GIA graded the 118.78 carat Graff Venus, claimed to be the largest D Flawless heart-shape diamond in the world. Courtesy: Graff Diamonds Courtesy: Alrosa How do you buy a diamond you love that is also within your budget? First, make sure you know what 4Cs quality factors you value most. Having the guidance...