Once a diamond has been made perfectly round and even, a Crossworker will continue the work started by the blocking machine. The Crossworker holds the diamond firmly in a tool called the "tang." This tang is equipped with a head that is able to swivel to give the craftsman exact positions for the facets that he or she needs to apply.
The rough diamond is then pressed against the polishing wheel. This wheel is impregnated with diamond powder and spins in excess of 2,800 revolutions per minute. The abrasion of the diamond powder against the rough diamond causes a facet to be cut into the rough diamond.
After this process, the diamond has its 16 main facets (eight top and eight bottom.) All of the ribs on the crown (top) and pavilion (bottom) line up correctly. All facet angles are set at their optimum measurement.
The precise settings of these angles ultimately determine how light is reflected from the diamond, unleashing its fire.
The crossworking process for a RAND diamond is far more time consuming than for other diamonds, as the Crossworker must constantly measure his work against the exacting specifications laid down by the blueprint. This is done by computer imaging the diamond each time a new facet is polished.
Once a diamond has been made perfectly round and even, a Crossworker will continue the work started by the blocking machine. The Crossworker holds the diamond firmly in a tool called the "tang." This tang is equipped with a head that is able to swivel to give the craftsman exact positions for the facets that he or she needs to apply. 
