Select round brilliant cut diamonds with ideal proportions, polish and symmetry become "Hearts and Arrows" diamonds.
These stones display a visual pattern of 8 hearts looking down through the pavilion and 8 arrows when viewing the stone in the table up position.

A special viewer (Hearts & Arrows Gemscope) is used to show this effect.

The IGI Hearts and Arrows Diamond Report can include either the actual pictures confirming the hearts and arrows of the stone, or the hearts and arrows visual illustration.