A round cut is the only pattern in the gems that have set the standard in the world of cuts that jewelry artisans and designers have created. This shape has set the criterion for all other gem shapes too and accounts for more than 75% of the gems sold today. The round cut has 58-facet cut and is divided into the crown at the top, and then girdle that is the widest portion as well as pavilion known as a root part of the stone. The round cut of the gemstone is calibrated through a distinct pattern to reach the maximum of fire and genius. Round is taken from the middle eastern word “rounden” which means “secret.” Round cut due to matchless skills and perfections of the craftsmen is too regarded as a Round Brilliant cut, American Ideal cut or as American Standard cut. Round Brilliant cut gemstone holds a standard number of facets that is 57, and this makes it a peerless cut among all other cuts. A round cut is introduced in the 18th century, but no single artisan has been credited for this mesmerizing cut. Although many sources do credit a Venetian cutter, Vincenzio Perruzzi, who is known for his excellent designs and unique cuts. Further, Marcel Tolkowsky appreciated as a mathematical genius, and the pride of Russia was a member of a diamond family. To maintain the esteem of the large and powerful diamond ancestors as well as family, he thereupon calculated the cuts necessary to fashion the ideal diamond shape. Tolkowsky’s mathematical skills, knowledge and on the basis of his mathematics Ph.D. thesis, he considered some important variables, for instance, the index of refraction and covalent bond angles to portray the pre-eminence of the Round Brilliant cut. It is too believed that Tolkowsky proposed that the height of the Round cut to make it a brilliant and exquisite should be 58% that of the diameter that further breaks down to about 43% for the base and nearly about 14% of the height of the top (crown). The 58% that is hard to obtain and need much concentration to craft the dimension of the gemstone makes it of great worth and value. Optically most effective and efficient, this round cut boosts up the jewelry artisans to understand the beauty of the diamonds as well as other precious gems in the eye of the jewelry lovers. The Round Brilliant cut is projected to provide maximum optical for brilliance and scintillation, as well as making the gem sparkle and dance in the illumination.This cut was particularly invented for the captivating Diamonds but is today common for all gemstones.