The 4C´s of diamond and quality.

The quality and value of diamonds is affected by 4 things (4C`s), the most decisive being the color, purity and quality of cutting and weight. We pay special attention to these four areas when choosing the right diamonds for our diamond jewelry. All diamonds used in Festive jewelry undergo an accurate microscopic inspection to monitor the quality of the diamonds and keep it of a high standard. Diamonds weighing 0.30 carats and above are graded in GIA laboratories, which are accompanied by a written certificate. By default, we use H (Wesselton)SI1 grade diamonds in our Festive jewelery. Its a quality with excellent value for money.
Raakatimantti - Kuvassa aito hiomaton timantti sellaisena kuin se on luonnosta löydettäessä.

Origin and ethics of diamonds.

Diamond Cuts

Diamonds are known for their ability to transmit light and sparkle strongly. This is crucial for diamond cutting . We often think of diamond cuts as shapes (round, heart, oval, awning, droplet, etc.), but diamond cutting and its quality really tells you how well a diamond’s surface interacts with light. A diamond of excellent color and purity can lose its value and brilliance if the cutting is done poorly. Diamond cutting is therefore crucial to the ultimate beauty and value of the stone. Of all the four (4C`s) main properties of diamond, cutting is the most complex and technically difficult to analyze. In successful sanding, proportions, chamfers, and bevel sets strive to create a perfect interaction with light to create visual effects: brightness, fire, and twinkle. All Festive jewelry uses professionally cut and carefully selected diamonds that accentuate all the best aspects of the diamond. All diamonds over 0.30 carats come with a GIA (Gemologigal Institute of America) diamond certificate with fine-grained cutting values. Cut quality is defined in English terms such as excellent, very good, good, fair and poor. In the certificate diamonds that we use in Festive jewelery, the rating of all areas that affect cutting is always at least very good.

The picture below shows the most common diamond cuts.


Natural diamonds originate from carbon that is exposed to tremendous heat and pressure deep inside the earth. This process can lead to many internal and external properties called inclusions, cracks, specks, scratches, cracks, etc. Assessing the clarity of diamonds involves determining the number, size, nature, and location of these properties, as well as how these affect the overall appearance of the stone. The clarity classification is made at ten times magnification. While no diamond is completely pure, the closer it is pure, the higher its value. The diamond clarity scale starts at FL (Flawless) and ends at I3 (included, level three). There is also variation in the clarity of diamonds within the purity class (e.g., SI). The degree of clarity is indicated by a number following the letter combination. The lower the number (1) after the letter scale, the purer the diamond.

The images below illustrate the effect of diamond defects on the purity rating.


Understanding what is meant by the color of a diamond will help you choose the right diamond. The color of a diamond refers to the absence of color, so color evaluation is based on how many shades of yellow or brown there are in a diamond relative to a completely colorless diamond. A diamond of perfect color is thus completely colorless, like a drop of clear water. Hues are graded from rarer to colorless on the GIA scale D-Z and on the very commonly used Scan.D.N. scale in the Nordic countries, which is not as accurate as the scale used by the GIA.


The weight of diamonds is expressed in carats (ct). One carat is 0.2 grams and is measured by weighing the Loose Diamond with an accurate diamond scale. The cutting quality of a diamond affects the diameter of a stone of a certain weight. A poorly polished stone may look much larger in relation to its weight, but loses its brilliance to a well-polished stone that looks smaller. Therefore, we pay special attention to the optimal dimensions of diamonds in relation to the weight of the diamond.

Below is an indicative table of how the weight of a diamond affects the diameter of the stone. (Image not at natural scale.)

The weight of the diamonds in the jewelery can be indicated either in detail, eg 5 x 0.05 ct, which means that the jewelery contains 5 diamonds weighing 0.05 ct or it can be indicated in total. 0.25 ct, or the total weight of the diamonds.