THE 4Cs + 1

The GIA, considered by the professional operators of the sector and by the best jewelry stores all over the world as the first gemological institute on the base of their credentials, it has developed a classification and a rigid international evaluation system concerning diamonds, given by the combination of four characteristics, best known as the 4Cs (carat weight – color – clarity – cut)

GIA’s criteria have been later adopted by the others Gemological Laboratories all around the World and they have always been using in the MASSIMO RAITERI selection gems process which in turn he has added a 5thCs, the most important of all: the CONFIDENCE.