Monday, 22 February 2021

Ellendale fancy yellow diamonds

The Ellendale 9 pipe historic diamond production reports 11.5% of diamonds are ‘Fancy Yellow’. Typically diamond mines produce less than 0.1% Fancy Yellow diamonds. Of the Ellendale 9 Fancy Yellow diamonds, 62% are classified as ‘vivid’ or ‘Intense’, the strongest graded yellow colours. The East Lobe of the Ellendale 9 pipe produced 16% Fancy Yellow stones.
Tests by the Delta Diamond Laboratory, in Perth, revealed that many diamonds featured a highly rare purple fluorescence under ultraviolet light. Fluorescence occurs in about 30% of natural diamonds and more than 95 per cent of these fluoresce blue, with yellow and green representing just a few percent.