The Flanders Ideal Square Cut diamond has the visual outline of a square shape but it has four short sides and four long sides, almost like an emerald cut diamond shape with its four cut corners.
The flanders square cut diamond is cut to ideal proportions for maximum brilliance.
This diamond cut was developed in the late 1980s by Belgian diamantaires with the aid of a highly sophisticated computer. The computer decreed that when a Flanders Ideal Square Cut diamond is more elongated, it needs the four extra facets.
PHYSICAL CHARACTERISTICS AND CUTTING ISSUES
When viewed from the top, the cut has two perfect squares at 45-degree angles to one another to form the table.
The square shape of the diamond has 61 facets, compared to 58 for a round brilliant diamond . Most Flanders Ideal Square Cut diamonds are cut in this square shape - less than 2 percent are cut in a rectangular shape, using 65 facets.
The goal of designing this diamond cut was to maximize brilliance regardless of weight loss; the loss is slightly greater than it is for an ideal round cut diamond.
The cut retains about 45 percent of the original weight of the rough, compared to 47 to 48 percent for a round cut diamond.