Garry’s passion for improving diamond quality led to the creation of several important tools that are now used worldwide. The Ideal Scope, invented in 1985, and the ASET Scope, developed for grading fancy-shaped diamonds, are just two examples of his contributions. The Holloway Cut Adviser (HCA), patented in 2007, is another significant creation that grades diamonds based on their spread, light return, fire, and scintillation, ensuring consumers get the best visual performance from their purchase.
