When a person looks at the diamond first time, the first thing he/ she notices are the angles, shape and polish of the diamond which makes it beautiful and dazzling. These factors enhance the beauty of the diamond and it is achieved only by the appropriate cutting of the diamond.
Obviously, there are so many ‘Cs' in the diamond making and maintenance, cut is most important part of diamond polishing as it is not determined by nature unlike others. An excellent cut is only achieved by the people who are expert in diamond cutting. All the facets of a diamond surface must be cut and shaped appropriately to add the total magnificence to the diamond. If the cut is not proper, diamond will look dull, dim and insensible.
Cut consists of three factors: proportions, polish and symmetry of a rock. These factors are directly proportional to the best possible light reflection of a diamond, which, ultimately, provides life to a diamond. In the case of the well-cut diamond, the light arrives at the table of a diamond and goes to the pavilion where it reflects on different sides and reflects back out of the diamond via table and to the spectator's eye. This startling lights reflection is the answer of the glittering of the diamond.
The well-cut diamond has three prime effects on appearance: Brilliance, Scintillation and Fire
It is achieved by exceptional polishing of a diamond as it completely dependent on light which reflects back from the diamond. When a light hits a diamond's surface, some proportion of light enters in the diamond and some proportion reflects back. The brilliance is the amalgamation of the white lighting reflections from the surface of a diamond and the interior of a polished diamond. Also, a contrast which appeared by the light also plays a big role in brightening of a diamond.
A proper scintillation can be achieved by the proper tilting of a stone. When lighting enters in the diamond, it creates flashes of lights in the areas where it is not reflected back immediately. It is likely to happen in the flood lit areas where strong light pass in the diamond from various directions.
Fire refers to light which reflects back from the surface of the diamond body. It appears in white flashes or in a rainbow of color. It is achieved by the proper dispersion and bending of a light, which is reflected back from the diamond.
Proportion, Symmetry and Polish
A diamond must be well proportioned which means the angle; size and shape of each facet of a diamond are well-associated. When a light hits on the surface of the diamond, 20% immediately reflects back off the surface while 80% of that enters in a diamond. A well-proportioned diamond is the one which reflects back the maximum light from the diamond due to its sharp and well-placed facets. A diamond's pavilion plays an important role in maximizing the amount of light that is reflected back from the diamond.
The amount of light which enters and exits from the diamond is directly proportional to its symmetrical facets. If all sides are not balanced, a diamond will look unfittingly shaped and slanted.
An ideal diamond is the one which has no scratches and marks. This can be accomplished by excellent polishing of the diamond. After the cutting, each facet of a diamond is polished under the supervision of the experts to make sure that there are no marks or stretches remain on a diamond body.