This scale is very precise in determining a stone's weight and is rounded up to two decimals.
unique and the higher priced. That’s the reason why a 2 ct diamond has not twice, but the triple value compared to a 1 Ct
Finally, the carat of a diamond has also a symbolic meaning. While the visual difference between a 0.98 Ct and a 1.01 Ct
diamond is hardly visible, the price of the 1.01 Ct will be noticeably higher. We can explain this price difference by the fact
that some weights are considered as 'magic sizes': e.g. 1.00 Ct, 1.50 Ct,…
graduated from D, which is colourless and the most searched for, to Z, the yellowest.
mentioned on their certificate. These coloured diamonds are extremely rare and therefore very precious, but also more
speculative. Our experts noticed that the market becomes remarkably smaller for reselling a very rare diamond (colorful,
In order to determine the clarity (or purity) of a stone, an expert will look at it under a magnifying glass (x10 enlargement).
Most diamonds are born with birth marks, known as inclusions. The fewer flaws are present, the more light can shine
through the diamond, and the better it will sparkle. The diamond can shine more than any other gemstone if the quality of its clarity is good enough.
The clarity of the diamond can be flawed in two ways:
- External impurities: the blemishes occur during the cutting process or are due to wear
- Internal impurities: these inclusions relate to any flaws within the stone. Many types exist.
Most common inclusions are:
- Black or dark spots, which originate in the coal
- Clouds - microscopic veils which weaken the clarity
- Feathers - most impurities in diamonds come out of the molecular break during the creation process of a stone from coal
Determining the clarity grades
Most often, a loupe or microscope (x10 enlargement) is used to determine the clarity of a stone. This means that flaws
that cannot be seen at this enlargement are considered as non-existing.
to a diamond’s proportions, symmetry and polish. If the depth of the diamond is too shallow or too deep it will allow light to
escape through the sides or the bottom of the stone. A well-cut diamond will direct almost all the light through the crown.
cuts. The most known are the marquise, pear, oval, heart and emerald cut.
Watch here two videos with more information about diamonds and certificates