1  |  Diamond, the unique substance.

The unique substance, an allotrope of carbon that has name diamond during thousands of years, attracts the curiosity and creativity of humanity. Its single crystals have the exceptional optical properties that can be seen in the beautiful polished stones that have made the diamond the symbol of value and wealth. It has an extremely rigid crystalline lattice, which provides outstanding mechanical properties, making the diamond the hardest material on the planet. Its optical properties, together with the hardness, have made it a favourite jewellery material and, given its rare appearance in nature, during the centuries diamond has the unquestionable value and it will have this value in the future.

2  | What about the laboratory grown diamonds?

Centuries ago, curious humans were looking for the origin of the precious stones, especially that of the diamond. In the 17th century, the famous chemist Antoine Lavoisier has discovered that “diamond is a crystalline carbon”. Since then, the challenge of making the diamond in the laboratory, using human technology has been fascinated by many scientists. Man-made diamonds, suitable for industrial use, were first produced in a laboratory in the 1950s. While the gem-quality diamonds were produced in a laboratory for the first time in 1971, it was not until the mid-decade of 2010 when synthetic colourless diamonds created in the laboratory entered the market of the gems and jewels in commercial quantities. Laboratory diamonds are as real as mined diamonds, in fact, they are identical. The only difference between the laboratory-grown and mined diamonds is the environment in which they were created. The extracted diamonds are formed in the depths of the Earth, while laboratory, or synthetic, diamonds are created in the laboratory. Both are formed by carbon and share the same physical, chemical and optical properties. Currently, the names recommended by CIBJO (in French is “Confédération Internationale de la Bijouterie, Joaillerie, Orfèvrerie des Diamants, Perles et Pierres”) and IGE (in Spanish is “Instituto Gemológico Español”) according to ISO standards are “synthetic diamond”, “laboratory-grown diamond” or “laboratory-created diamond”.

3  | The differences between synthetic diamonds and natural diamonds.

The laboratory-created diamonds. (also known as synthetic diamonds) entered the gems and jewellery market about five years ago. Although they are identical in appearance to natural diamonds, they have very small differences that can only be detected by trained gemmologists and sophisticated equipment designed for that purpose.

There should not be a debate about whether laboratory synthetic diamonds are real. The only values of a diamond extracted from the mine are its rarity and the fact that it is a unique piece. On the contrary, synthetic diamonds offer values of sustainable use of natural resources and are the result of a great effort of scientists, engineers and technicians. This human effort is not only reflected in the excellent consumption product, but also in a significant advance of the one most emerging world technologies.

Scientists have worked rigorously to create pure diamonds, which means that synthetic diamonds have fewer imperfections and defects than their extracted counterparts. Therefore, when the synthetic diamonds are qualified during the certification process, their medium degree of clarity is better than those of natural stones. Each diamond we sell is certified by an independent laboratory, and the details of the qualification report can be seen in the respective product descriptions.

4  | Main characteristics.

A brief introduction in 4C.
By the internationally accepted norm, polished diamonds are qualified by 4 most important parameters: carat weight, colour, clarity and size. In English, these terms correspond to Carat, Color, Clarity and Cut

Carat weight*
It is the main character from which the size of the diamond can be approximated for each type of size. Traditionally, the price per carat for large stones is higher, due to the rarity of these stones in the mined material or the greater effort in making large-sized synthetic stones. Even so, it is very frequent that the diamond of the same origin and less weight can have a higher price than a larger diamond, but with other lower parameters.

* Carat (ct.) Is the measure of weight in gemmology and jewellery. 1 ct. It is equivalent to 0.2 grams.

Diamond colour

In the case of valuing the colourless diamond, letter scale is used to characterize the yellowish tone of the stone. The scale is from D to Z, with D being the best qualification and Z being the worst. For an inexperienced person, it will be difficult to distinguish solitary stones in colours between D and J. The colour test is done in the laboratory with a colorimeter or to the eye using a colour scale. It turns out that in certain light conditions, the human eye can distinguish between two stones the darkest within the range of a letter. For the consumer, it is important that if there are several stones in the jewel, they must be of the same letter to make a better impression. Fantasy or fancy coloured diamonds. They are diamonds that have a visible colour that could be yellow, brown, pink, blue, etc. The colour of these diamonds is qualified following international regulations.

Diamond clarity
Like all single crystals, diamonds can have defects and inclusions. 10 degrees of clarity can be assigned to a diamond, ranging from impeccable (FL) to visible inclusions (I). The best quality scale to the worst is IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2, I3. Diamonds that visibly have some defects and/or inclusions, typically have lower quality than VS2.

Diamond cut

The diamond cut is characterized by the shape and proportions. The most common shape of polished diamond is round cut, other shapes are emerald, princess, oval, baguette, pear and several more. The shape of the cut depends on the shape of the raw material and is chosen both for better use of the rough diamond and for creative design needs. As an extreme example of the creative design of the stone can be mentioned the cuts in the form of heart, star or rose.

The proportions of the cut stone are crucial for its brightness and beauty. Like the optical material, the diamond has the refractive index that determines the ideal proportions. Out of these proportions, the brightness of the stone is worse, since the light stops passing through the crystal by the optimal manner. In the standard used by GIA (Gemological Institute of America, one of the most prestigious diamond certifiers) determine these proportions on the scale of Excellent, Very Good, Good, Fair and Poor. The proportions of stone are in general the appreciation of the quality of work of the polisher and influence the diamond value significantly.

5  | Value of diamonds.

The process of growing a diamond in the laboratory needs many resources, such as expensive and quite heavy specialized equipment, and a maintenance team made up of high-ranking scientists. This process is much shorter than in nature, we don’t need millions of years to create a diamond. Neither it is necessary to do the massive excavation and question the sustainability of the production process, as in the case of diamonds extracted from mines. In the current retail market, the price of a diamond achieved in the laboratory is 30% less than its natural analogue.

It is important to note that the diamond price, both natural and synthetic, is influenced by several factors, the most basic of which are described in the previous part (a reference to part 2,4). Thus, it is sometimes difficult to assume that a natural diamond is cheaper than a synthetic diamond of the same size. We advise to always look at the certificate, especially the 4C parameters. In most cases, it is enough to discover the differences. The low price of a natural diamond always has to alert the consumer and in that case, it is better to consult with the gemmologist, since this particular stone may have an unwanted defect or peculiarity. In the case of synthetic diamonds, the 4C parameters offer a more viable assessment.

6  |  Certification.

All Lab Verum Carat diamonds are certified by prestigious entities, such as the Gemological Institute of Spain, International Gemological Institute and other entities. They are sold in sealed packaging, together with a certificate copy that includes weight, clarity, colour, size and other important parameters to value the stone in national and international markets. Synthetic diamonds are not all the same, and their value changes accordingly to the unique characteristics of each unit. The certification that accompanies each piece we sell, guarantees the value of the gem, is accepted and recognized throughout the world. The certificate number and the name of the certifier accompany each of our diamonds larger than 0.3 ct. By entering the certificate number on the certifier’s website, you can verify in real-time the authenticity of your stone and download the copy of the certificate, even before making the purchase.