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


We invite you to come and see our new modern 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.

Water resistance on watches  


Water Resistance is a common mark stamped on the back of timepieces signifying a depth (BAR, ATM, meters or feet), to withstand a static pressure for a short period only at the stated depth. It can range from 30-1000 meters, resistant to accidental splashes to high impact water sports and scuba diving.


  • 30 meters/100 feet/3 bar: General water resistant watches can withstand minor moisture from splashing, but should not be worn for swimming, diving, bathing, or showering. Most people believe that “water resistant” printed on the dial means the watch is sealed for swimming, diving, showering, etc. Not true. General water resistant watches should not be used underwater.


  • 50 meters/164 feet/ 5 bar: These watches can be used for swimming in shallow water, but not for snorkeling or other water sports.


  • 100 meters/ 328 feet/ 10 bar: These “divers’” watches can be used for snorkelling, swimming, and other water sports, but not high board diving or sub aqua diving.


  • 200 meters/ 662 feet/ 20 bar: Suitable for high impact water sports and aqua diving not requiring helium.


  • 300-1000 meters: These are professional divers’ watches and can be worn for deep water diving.


Our Recommendations


  • Water resistance is not permanent. Gaskets around the crown, crystal, and case back are subject to wear. Any time that a watch is opened for service or battery changed, the gaskets should be replaced along with a water-resistance test.
  • Avoid contact with perfumes, spirits or petroleum products as these may damage seals, straps or case/bracelet.
  • Do not shower or swim with your watch unless it is rated 100m/330ft and has a screw-down crown.
  • Ensure that the screw-down crown is always pushed in and tightened, especially before immersing in water.
  • Do not subject your watch to extreme temperature changes, example in steam bath or sauna.