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.