There are many specific proportions that diamond dealers
look for when selling round diamond cuts; for example, the diamond should use the Towlkowsky ideal cut method, which follows
certain mathematical principles to shape the diamond ideally. Following the Towlskowsky ideal cut, the diameter of a
premium round cut method should be between 52.4 to 57.5 percent, the girdle thickness should be between thin and thick, the
pavilion should be 42.2% and 43.8% and the crown angle should be 33.7% and 35.8%
Diamond companies will usually indicate that their diamonds
are ideally cut when the measurements and specifications are within the ideal range set forth by the Towlkowsky method, or
at least very close to it.
Round cuts are highly popular in the consumer market and
are used as a center stone and side stones in rings as well as on other types of fine jewelry. As always, make sure you inspect
the diamond closely or ask for an independent appraisal to determine the quality of the stone and the retail or wholesale
value of it.