Jewellery scion Margot McKinney and Tribeca portfolio manager Ben Cleary have raised $50 million to turbocharge their new hard-asset diamond fund, built around a rare collection of Argyle tender “hero diamonds”, the last from the now-shuttered Rio Tinto Argyle pink diamond mine.

Aiming to ride the wave of ultra-luxury demand, the new Kimberley Syndicate hopes to double investors’ money over the next three years, boosting the value of their rare portfolio using Ms McKinney’s jewellery design skills and a global network of investors and events.