The shape and cut of a diamond

The most sought after is the round diamond that is also named Brilliant, thanks to it’s exceptional sparkle.

1. The most important shapes

– Round diamond called Brilliant

It is not untill the start of the 20th century that a cut considered perfect is being perfected under the name « Feinschiff ». Also called « Brilliant Cut », this cut has a round shape and consists of 57 facets, of which 24 on the lower half of the stone and 33 on the top half. The brilliant, named after it’s sparkle, is the most sought after diamond in the world. The light, that is captured and reflected several times by the facets before it leaves the diamond though the table, lets it sparkle like a thousand little lights.

– Fantasy shapes/cuts

The Fantasy cuts are less sought after, but can be chosen by the diamond cutter because of the shape of the rough diamond or for any inclusions captured in the stone. The most important for the proffessional is to get the most out of the rough diamond he has in is hands. Nevertheless, the proportions of the diamond are equally important and the Fantasy cut diamond is evaluated in the Certificate in the same way as the round Brilliant cut diamond

2. Proportions, Symmetry and Finish

The shape of the diamond, the polish, the proportions and symmetry have an immediate impact on the clarity of a diamond.If these conditions are not respected, the beauty of the diamond is greatly affected.

– Proportion and symmetry
Normally, round diamonds are cut in 57 facets, who’s placement is defined by a mathematical formula. All angles are coherent with each other, in the same way the height of the culasse and the couronne are related to the size of the table to maximize the amount of light reflected by the diamond in order to optimize it’s sparkle.

– The Finish
The finish of a diamond is generally defined as moderate, normal, good, very good or excellent. When buying a diamond of good to excellent finish means a diamond with a minimal or no trace of roughness.