The natural diamond is pure native crystalized carbon formed under very high temperatures and pressures. These conditions occur in limited zones of earth’s mantle about 90 miles under the earth surface. Diamonds formed (up to 3,9 billion years ago) and stored in these “diamond stability zones” are delivered to earth’s surface during deep-source volcanic eruptions. During this long formations, natural inclusions or flaws could appear in the diamond. Most of these inclusions will never appear in synthetic diamonds, which are machinery made.
HOW COULD NATURAL DIAMONDS BE DEFINED
Natural diamonds could be defined in 2 major categories: the TYPE I(a & b) and Type II(a & b). Most of natural diamonds are diamonds from Type I, while Type II natural diamonds are extremely rare.
HOW ARE DIAMONDS EVALUATED
The diamond is evaluated by the 4 C: CARAT, CLARITY, COLOUR and CUT. These 4 C will determine the value of the diamond. Rarely two diamonds are exactly the same.
MORE ABOUT CARATS
The carat or the weight of a diamond is one of the measurements to evaluate the diamond. One carat is equal to 0,02 gram. A diamond of 5 carats weights 1 gram. One carat could also be divided into 100 points. A diamond from 50 points weights 0.50 carat or half a carat. Be careful, because two diamonds can be of equal carat-weight, but their value can be different mainly due to the cut, colour or clarity. The weight is very easy to measure.
MORE ABOUT CUT
One of the C is the cut or the proportion of the shaped diamond. An excellent cut is when the maximum amount of light that enters through its top will be reflected and dispersed back through its top. Standards are set to evaluate the quality of the cut and determine its value.
MORE ABOUT COLOUR
Diamonds exist naturally in every colour. But most people are concerned with diamonds in the white range. The best colour for the white range is colourless without a tint of yellow. So the range goes from D (colourless) to Z (light yellow). These Standards evaluate the range of colour and thus its value.
MORE ABOUT CLARITY
The clarity of diamonds is determined by the amount and location of inclusions or imperfections in the diamond when viewed with a loupe (magnification x 10). The clarity grades in diamonds are set by standards from Flawless to Imperfect 3 standards. The fewer the inclusions, the more beautiful and valuable the diamond will be. And if there are inclusions, the position of an inclusion in the diamond is important to evaluate the clarity of the diamond.