Cut or the proportions (angles and relative measurements) of a diamond dramatically affect the interaction between the diamond and the light around it. A well-cut diamond will direct more light through the crown. A diamond with a depth that is too shallow or too deep will allow light to escape through the sides or the bottom of the diamond. 90% of diamonds are cut to retain weight, attention is not paid to proportions, so a very good / excellent or ideal cut diamond is very special.
Colourless diamonds are rare, most diamonds have a hint of yellow or brown. The normal colour range is a scale of D (colourless) to Z (light yellow or brown). D to F are considered colourless and are extremely rare and valuable. G to J, nearly colourless. K to M have faint colour (the romantic look of candlelight). N to R are a very light colour. S to Z are light in colour. A, B and C are no longer used, they represent an older, less accurate method of grading. Each letter represents a range of colour based on a diamond's tone (degree of darkness or lightness) and saturation (colour's strength or intensity). It is very difficult to tell the difference from one colour grade to another colour grade. That is why it is important to compare diamonds side by side.
Diamonds are formed 90 to 120 miles below the surface in the Earth's mantle under tremendous temperature and pressure. Given those conditions, most have irregularities. Irregularities are what make a diamond unique - one of a kind. Think of it as a fingerprint or a snowflake, there isn't another exactly like it. They also make diamonds affordable! Even small irregularities can have a large influence on diamond value.
SI diamonds appear flawless when not magnified and are the best selling diamonds. Less than 1% of diamonds mined have no clarity characteristics - there are few things in nature as rare as a truly flawless diamond.
Carat is the international unit of measurement for gem weight. One carat equals 1/5 of a gram (0.200 g.) 142 make an ounce. You can send 142 one-carat diamonds in an envelope with a single postage stamp! A point is one one-hundredth (1/100 or 0.01) of a carat. The modern carat system started with the carob seed from the locust tree. The seeds are grown in pods and are used for flavouring and livestock feed. Early gem traders used the small uniform seeds as counterweights in their balance scales.
The majority of diamonds used in jewellery weigh less than one carat. Although size is an important factor in determining the value of a diamond, the cut, color, and clarity are equally important.
We have proudly vowed to follow a rigid policy that ensures the diamonds we purchase are mined and distributed under the highest ethical standards. In May 2000, global participants came together in Kimberley, South Africa, to create and implement standardization of certification among diamond exporting countries, thereby creating common language, transparency, auditing and monitoring of diamond exportation.
Since the Kimberley Process has been put in place, it is estimated that 99.8% of imported diamonds are certified conflict free diamonds.