These 4 Cs stand for:
- Carat: It is the unit of weight, carat. Cts is how you write it and 1ct is equivalent to one fifth of a gram.
- Color: It measures the colour of the diamond.
- Clarity: Measures the level of impurity of the diamond.
- Cut: Measures the symmetry, proportions and the diamond’s polishing.
With these parameters we can make an easy analysis of a diamond. If your diamond is big, with a rare colour and well sculpted, it will be worth a lot more than if it didn’t !
Basic notions to understand a diamond certificate:
Inside a certificate we’ll find the following information:
- Number of certificate Corresponding to laboratory and date of issue.
- Form and type of stone carving (round, rectangular, oval, heart…).
- Measures expressed in this way: smaller diameter x diameter x height increased.
- Grading 4Cs results. Measurement of the four variables:
- Carat weight
- Color grade
- Clarity grade
- Cut grade
- Additional information:
Here appear very different, but important data to determine the quality and price of the diamond. Such as:
In a certificate, we will find a number of measures that will provide us with adequate information to determine the quality of a diamond’s size.
The quality of the carving encompass other measures and angles, we have three different terms :
- Cut grade
These three terms will come classified as :
VG- Very good
Sizes and Angles:
The terms are:
TD- Depth – Height: Ideal measures between 60 and 63 %
Table TS- Size- Ideal measures between 56 and 60 %
PD- Pavillion - Ideal measures between 43 and 44 %
CH -Crown Height - Ideal measures between 13 and 15 %
The listed angles are:
CA- Crown Angle- Ideal girdle -33.5 to 34.5 °
PA- Angle- Ideal girdle -40 to 41.5 °
Girdle and Culet
In a certificate we are also going to suggest two very important details of the stone, such as the thickness of the girdle and the culet termination:
- Girdle Girdle: Can be: fine ( thin) average ( medium ) – thick – very thick
- Culet: Normally NONE of FACET.
These two details, even if they seem otherwise, are very important, since a faceted culet, imply a worsening in termination and brilliance of the diamond, since the light would pass through it. In addition, a very thick girdle imply that the stone weighed more, which would not have an adequate correspondence between weight and size.