Диаманта е творение на природата, а човешката изобретателност и майсторска обработка го правят съвършен и необикновен. Шлифоването е една от най-важните характеристики за Диамантите. Добре шлифования Диамант е с отблясъци и игра на светлината, има живот в него. От шлифоването на Диаманта се определя и нговото блестене. Всеки един диамант се шлифова на ръка от обучени катъри, сложен и дълъг процес. За да сте сигурни дали вашият Диамант е с добра шлифовка е нужно да разполагате със сертификат от световна лабория.
А ето как изглеждат и нешлифованите Диаманти:
Cut is possibly the most important factor in the Four Cs, because cut is what gives a diamond its brilliance. Cut is certainly the most misunderstood and controversial of the four Cs. When we talk about cut, we mean much more than the shape of a diamond. We are talking about the technicalities of exact angles, proportions, symmetry, and polish that affect the way a diamond handles light.
In short, how well a diamond is cut determines how well the diamond will shine.
How can you tell if a diamond is well cut? The most common answer is to talk about proportions: whether the stone is too shallow, too deep, or just right. But fine cutting is not just a matter of proportion. A well-cut stone is carefully and precisely crafted: all the facets are exactly where they should be and polished until they gleam. To be well cut, a diamond must have the right proportions, precise symmetry, and a fine polish. Diamond dealers refer to this as "make," and it is the only thing about a diamond's quality that can be controlled by man. A stone with fine make has been carefully fashioned by the cutter to maximize its potential.
Whether you choose an emerald cut, an oval, a marquise, or any other diamond shape, a well-cut diamond will reflect light back evenly in the face up position, with no dark areas. A well cut diamond returns the maximum amount of light to the eye as brilliance. A well cut diamond also displays dispersion or fire: spectral colors of light that add richness to its sparkle.
Because the round cut is more standardized than the others, cutters have argued for about a hundred years about the best possible set of proportions for a round brilliant cut. How deep should it be? How large should the table be? What combination of angles results in the best balance of brilliance and dispersion?
One particular set of proportions for the round brilliant called the "ideal cut" has become very popular. Is it the best? The industry is still actively debating this point. Not all diamonds that are exceptionally brilliant have these proportions, and not all diamonds with these proportions are exceptional when it comes to handling light. Ideal cut diamonds also look smaller than finely cut diamonds with other proportions because they are more deep and less wide than standard cuts.
Whether or not you choose a diamond with ideal proportions, don't forget to look at the quality of a diamond's symmetry and polish. These will be noted on all diamond grading reports as excellent, good, fair, or poor.
As you may have guessed, symmetry refers to how well the facets line up against each other, which determines how efficiently they will reflect and refract light between them. Polish, of course, refers to how well the diamond has been buffed to a smooth finish. Poor polish will dull a diamond's sparkle, which once again comes from its reflection and refraction of light. When a beam of light touches the surface of a diamond, some is reflected back to the viewer. This is known as "external reflection." As the rest of the ray penetrates the stone, it is deflected by the stone's density toward the center of the diamond. This is called "refraction." The ray is then reflected from the internal surfaces of the stone and back out the top. This is known as "internal reflection."