The weight of a diamond is expressed in carats. One carat equals 0.2 grams or 100 points. Each diamond is weighed on 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 common misunderstanding is that the term ‘diamond cut’ would also refer to the diamond’s shape. However, cut is what determines how well-cut your diamond is, whereas shape is the shape it was cut into. Diamonds can be cut into various shapes of which the round brilliant is probably the best known.
Most diamonds range in colour from white to slightly yellow. However, diamonds can occur in all sorts of colours ranging from brownish to striking yellow, pink, purple, red and blue. These are called ‘fancy colours’.
All diamonds have traces of their growth history. The clarity scale reflects the size, number, location and visibility of the internal characteristics when examined with a 10x loupe.