Because the round shape was essentially the standard Faceting industry, over 90% of diamonds on the market have this form of cutting. Round-cut from all other forms are distinguished primarily by the standard pattern of faces and proportions, the approach to assessing the quality of treatment, the higher cost. On the other hand, the famous diamond cutter from Antwerp Gabi Tolkowsky that limit for their lives a lot of diamonds, believes that the correct call fantasy is a round shape. The fact that diamonds found in nature in different forms, but those sections of diamond crystals, which determine the future shape of the diamond may be square and rectangular, and with chamfered corners and triangular, but never – round. It is known that when cutting a round diamond stitch in the usual deadweight loss, more than half the mass of the original diamond losses cut fancy shapes less.
The attractiveness of fantasy ogranok based mainly on the attractiveness of their shape. In some cases, the name of a cut sounds more appealing, such as "Princess>>. Standard round cut the most thought out in terms of optical properties, ie sparkle, scintillation, the game, so usually fancy cut diamonds are worth less (in dollars per carat) rather than round. This is because when cut fancy shapes used flattened or elongated diamonds, and the yield is greater than in the manufacture of round brilliant cut diamonds of the same crystal. If we restrict various forms of cut diamonds, but for them to sustain the same mass, then one will be visually more than round, such as awnings or Trilliant, others – less than, for example, Princess.