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Here are some things you need to know about our diamonds.
Most diamonds range in colour from colourless to slightly yellow. The colour grade is determined by comparison with a series of master stones, the best grade being colourless - a perfect diamond has no colour at all (D Colour: Exceptional White +). Diamonds can also occur in all ranges of colours, from brownish to striking yellow, pink, purple, red, blue and green. These are called 'fancy colours'. Some diamonds react to UV-light (black light) with a grading scale for fluorescence, which ranges from 'nil', 'slight' or 'medium' to 'strong'.
The weight of a diamond is expressed in carats. One carat equals 0.2 grams or 100 points, which indicates the size. HRD Antwerp has extremely accurate scales that measure up to 1/100,000 of a gram. This accurate weight is very useful for the identification of the diamond.
A diamond’s cut is essential to its beauty. The cut is divided into 3 grades: proportion, polish and symmetry. Each grade is evaluated according to 4 parameters: Excellent, Very Good, Good and Fair. If the diamond is not well cut, it will not interact with light as it should. A perfect cut equals more sparkle and fire, and an even pattern of bright and dark areas.
Clarity refers to the diamond’s purity. All natural diamonds show traces of their growth history, which tend to be minor internal characteristics in gem-quality diamonds. The clarity scale reflects the size, number and location of these characteristics when examined with a 10x loupe. Diamonds that have no inclusions visible to the naked eye are of excellent quality. The very best – and rarest – clarity is called ‘loupe clean’. This means that no inclusions can be found when examining the diamond with a loupe.