We identify three primary visual characteristics of fancy color diamonds:  Inner-Grade, Color Dispersion, and Undertone (IDU). We use grades 1, 2, 3, and 4. Grade 1 being the lowest quality grade and Grade 4+ is the highest possible grade, granted in rare cases and denotes stones with exceptional quality characteristics. Inner-Grade refers to the strength […]

The issue of Fancy Color Diamonds’ rarity has never really preoccupied the geological community. This may be because the industry relies on rough numbers, so it may not be necessary to chase down these elusive figures. Hypothetically speaking, to come up with a rarity estimate of fancy color rough diamonds, a ###truncate### centralized body would […]