These gem Pieces are shaped using the Round Brilliant Cut This design was developed by Marcel Tolkowsky Tolkowsky mathematically calculated the properties of light and how it reflects and refracts within a diamond This is also known as the American Standard Cut and is the common cut design in North AmericaAll of the gems we carry are shaped using this cutting method They can also be used as centerpieces for special events and ceremonies. Brand New100% These gem Pieces are shaped using the Round Brilliant Cut. This design was developed by Marcel Tolkowsky, an engineer from a family of diamond cutters. Tolkowsky mathematically calculated the properties of light and how it reflects and refracts within a diamond. This is also known as the American Standard Cut and is the common cut design in North America. All of the gems we carry are shaped using this cutting method. This cutting method maximizes scintillation of light as it passes through each gem. This gives it a mystifying sparkle and brilliant shine. Each piece is carefully hand cut and polished to bring out the gems potential as rays of light pass through it. Our gems are very eye catching and have an attractive appeal. These gem pieces can be displayed in the home or office. These collectible gems add color to any room and brighten up your living space. They can also be used as centerpieces for special events and ceremonies. Gives these to your guests as party favors!