Posts by Michael Cowing

  Round Brilliant Cut Beauty and Light Performance Part 1 Going back over 100 years, numerous efforts have been made to analytically prove the superiority of the small range of angles called ‘Ideal’. Several metrics and methods have been developed in attempts to provide this proof. Ray tracing was employed by many (e.g. Marcel Tolkowsky…

Round Brilliant Cut Beauty and Light Performance Part 2 Going back over 100 years, numerous efforts have been made to analytically prove the superiority of the small range of angles called ‘Ideal’. Several metrics and methods have been developed in attempts to provide this proof. Ray tracing was employed by many (e.g. Marcel Tolkowsky in…

Discover the  ‘Diamond’s Spectral Constellation’, also called the ‘Spectral Reflection Pattern’.  Michael D. Cowing explains why the ‘Spectral Constellation/Reflection Pattern’ is the nexus connecting a diamond cut’s light performance and its illumination and why it is the key to understanding the occurrence of fire in a diamond when used as a gemstone optical analysis technique.…

  A contribution to knowledge in the field of diamond and gem optics, faceting, and design. It is a contribution to the World Gem Foundation’s quarterly journal, ‘Gemmology Today’. The whole journal issue is a free download. Geoff Dominy, World Gem Foundation: I feel very fortunate to know Michael Cowing. He has a brilliant mind.…

Many discoveries await in this work written for the twin worlds of ‘Diamond Cutting’ and ‘Gemstone Faceting’. Discover the attributes and properties of the most beautiful round brilliant diamond cut, the Ideal Round Brilliant, and the reasons it possesses the best optical light performance. Discover that those properties also result in the best beauty and…