Fancy colour diamonds – those vibrant natural treasures that are only formed in the perfect geological conditions – are the very definition of rare.

CTF Pink Star, 59.60 carats

The Dresden Green, 40.70 carats

The Hope Diamond, 45.52 carats

The Tiffany Yellow, 128.54 carats

The Argyle Violet, 2.83 carats

The Winston Red, 2.33 carats | The Moussaieff Red, 5.11 carats

Eden Rachimov, The Fancy Color Diamond Book

David Kellie, Natural Diamond Council