Cushion Diamond 63.6ct — Square cushion stone paired with Cullinan III in a royal brooch
Cullinan IV is associated, in the documented record, with a Cushion Diamond of approximately 63.6 carats. Square cushion stone paired with Cullinan III in a royal brooch (1911).
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.
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Documented. 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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