Cut diamonds are popular because of their incomparable brilliance. The geometry of the cut gives the gemstone the fascinating refraction of light, making it exceptionally popular. Since the development of the synthesis for high-purity, bright diamonds, this has been recommended in the market and offered by CERATONIA under the name CREATED DIAMOND parallel to naturally grown diamonds.
The quality of a diamond is evaluated according to the four main characteristics, the 4 C's:
Carat
Color
Clarity
Cut
The weight or size of a stone is expressed in carats (1ct = 0.2 grams). For stones smaller than 1 carat, one also speaks of "points" per stone. 100 points per carat (1 point = 0.01 ct).
The colour scale measures the degree of "colourlessness" of the diamond, for which the letters D-Z . are used internationally. Whereas "D" diamonds are absolutely colourless, diamonds of colour grade "Z" show a yellowish tinge. The correct colour of a diamond is determined by the trained gemologist using the internationally recognised colour set, the master set, developed by GIA. (Gemological Institute of America). As a rule of thumb, from colour grade D to G, even a tending yellowish colour is barely noticeable.
International term | GIA-Designation | IDC |
River | D E | High Fine White+ High Fine White |
Top Wesselton | F G | Fine White+ Fine White |
Wesselton | H | White |
Top Crystal | I | Lightly tinted white+ |
Crystal | J | Lightly tinted white |
Top Cape | K L | Tinted White+ Tinted White |
Cape bis Yellow | M-Z | Tinted |
Diamonds consist of a single element, namely carbon. At extremely high temperatures above 1000°C and high, constant pressure, such as exists deep in the earth over millions of years, diamonds grow under the earth's surface. Volcanic eruptions brought these layers to the surface.Depending on the environment and the level of constancy of this, so-called "inclusions" remain inside the diamond, quasi as a "fingerprint". These small mini-inclusions are individual to each diamond and make the diamond truly unique. To determine the clarity of a diamond, the stone is assessed under tenfold magnification with a magnifying glass, and if no impurities can be detected, the stone is classified as flawless (IF=Internally flawless). The purity scale virtually measures the absence of such inclusions. It ranges from F for "Flawless" to I for "Included" (with clearly visible blemishes).
The cut, or shape, is the most important feature of a polished diamond and is immediately recognisable. It is also the only factor that can be influenced by man to determine value. The more the proportions and the arrangement of the facets are matched, the clearer the diamond crystal will shine in its most beautiful sparkle.
In very well cut diamonds, almost all the light that penetrates is reflected back through the crown.