Fancy Yellow Diamond 407.78ct — Fancy brownish-yellow trilliant cut from a Congo rough
The Incomparable Diamond is associated, in the documented record, with a reported Fancy Yellow Diamond of approximately 407.78 carats. Fancy brownish-yellow trilliant cut from a Congo rough (1984).
Within the Legacy Diamond Icon Archive this entry sits alongside the great diamond stories — a reference point for the cut, the colour and the moment it marked. The full Legacy Story for this icon is being written; the verified specifications, provenance and sources below are confirmed today.
Taken in the spirit of this Fancy Yellow Diamond — pieces from the Legacy vault, and a one-of-one commission.




Reported. This is an editorial reference compiled from public sources — a record of notable jewels in history, not a statement of endorsement or of any association with Legacy. Source: primary reference. Last verified July 2026.
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