The beauty of jewellery and watches is appreciated through certain factors, beginning with knowledge, expertise and a great passion for jewellery and gemmology. At B. Serkos, we are proud to relay this knowledge to you, helping you make an informed decision before any purchase. All this in a very pleasing atmosphere.

We invite you to come and see our showroom. We will be pleased to serve you.

Fundamental elements of a diamond


When one thinks of size of a diamond, they probably think of the form. This is partly correct. Although size refers to form, it also refers to the proportions of the size of the diamond.

A rough diamond is shaped into a certain form, respecting guidelines set out by the consumer. The various forms of diamonds include round, oval, square, princess-cut, emerald-cut, baguette-cut and marquise-cut. Several specialty forms are also available. The proportions of an entire diamond, along with its numerous surfaces or facets also play a role in “size” of a diamond.

The coherence and equilibrium of these elements also have a big influence on the scintillation of the stone.



The most precious diamonds have the least colour, at the exception of some colored ones which fall in the classification of exclusivity. The colour scale for the transparency of diamonds is as follows: D to F (colourless), G to J (almost colourless), K to M (barely visible yellow), up to Z (pale yellow). Colourless diamonds are quite rare.

When diamonds contain traces of other minerals, rare and magnificent colours are exposed. These
« fancy » colors can range in the shades of blue, yellow, red, brown, pale green, pink and purple. This rare phenomenon makes these naturally colored diamonds valuable, exclusive and in high demand.



The clarity of a diamond is measured by the presence or absence of visible defects. Slight imperfections on the surface or internal inclusions, including those that can be detected only with a jeweller’s magnifier, can alter the brightness and scintillation of a diamond, and therefore its value. The levels of clarity have a broad range: absolute perfection of a diamond (F – IF), very, very small inclusions (VVS1 – 2), very small inclusions (VS1 – 2), small inclusions (SI1 – 2), numerous inclusions or imperfections (I1, I2 and I3).



The mass of a diamond is measured not only by its dimensions, but also its weight. A carat is the traditional unit for measuring the weight of precious stones (equal to 200 milligrams or 0, 2 grams). The weight of a diamond can also correspond to points. A point is equal to 1/100 of a carat. Consequently, a diamond of 75 points is equal to 0, 75 carat. Diamonds of different forms can have equal weight, depending on their depth and their proportions. Diamonds of a large size are exclusive and in high demand, largely due to their rarity.

Birthstone chart