The Missing Diamond Shortage

Long promised diamond supply gap stubbornly refuses to materialize

A pile of colorless and colored uncut diamonds sit on a sorting table before processing at DTC Botswana, a unit of De Beers, in Gaborone, Botswana.

Chris Ratcliffe/Bloomberg
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If you’ve ever been to a diamond investment pitch you’ve probably seen ‘The Chart,’ the one where diamond demand soars, while supply trails forlornly in its wake.

For at least the last decade the looming supply gap has been a presentation staple, illuminating the the dearth of new mines and ever expanding appetites for luxury from Shanghai to Mumbai. The only problem is that the x axis keeps shifting, it’s always jam tomorrow.