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A selection of lab-grown diamonds that De Beers is selling under its Lightbox brand. Photo: De Beers

The ‘unsustainable’ price of lab-grown diamonds has collapsed 60 per cent, says De Beers, after stunning industry with synthetic stones for jewellery

  • De Beers says the massive price falls will continue as improved technology increases the quality and volume of lab-grown diamonds for jewellery

Wholesale prices for lab-grown diamonds have fallen by up to 60 per cent since De Beers began selling synthetic stones for jewellery in September, CEO Bruce Cleaver said on Thursday, adding margins for the sector would continue to fall.

De Beers, part of mining group Anglo American, shocked the diamond industry last year when it announced it was reversing a decades-old policy of selling natural diamonds only for jewellery and synthetic stones for industrial uses.

Its Lightbox brand, created for the new synthetic venture, is starting small, selling 20,000 carats by the end of 2019, but De Beers has invested in a synthetic diamond factory in the US state of Oregon, which should produce more than half a million rough carats a year when fully operational in 2020.

Already, the impact on synthetic pricing had been huge, Cleaver said, citing De Beers’ analysis that showed an up to 60 per cent fall in wholesale prices. He said the slide would continue as improved technology increases the quality and volume of lab-grown diamonds.

“The margins that were out there are not sustainable,” Cleaver told Reuters in an interview. “I like to compare it to a flat screen TV. The first ones were very expensive and the quality was poor.”

Cleaver however denied synthetic diamonds were cutting into the price of natural stones, which he says are a different product. “It’s a perfectly legitimate business. It’s just a different business,” he says of lab-grown diamonds.

Much of the aim of De Beers, the world’s leading diamond seller by value, in launching Lightbox is to differentiate diamonds grown in a laboratory from those found in the earth.

Bruce Cleaver, CEO of De Beers, pictured in Hong Kong in 2016. He says the price of synthetic diamonds is unsustainable. Photo: Reuters

In contrast to the commodities that form the bulk of Anglo American’s portfolio, demand for diamonds, which is listed in its results statement as among the company’s “principal risks and uncertainties,” is reliant on marketing.

Without giving numbers, Cleaver said De Beers would boost its marketing budget for natural stones this year, which already in 2018 was the highest in a decade at US$166 million.

The “seeds” of lab-grown diamonds that De Beers is selling under its Lightbox brand. Photo: De Beers

While Anglo American’s overall core earnings for 2018 rose by 4 per cent, De Beers’ underlying earnings before interest, tax, depreciation and amortisation fell by 13 per cent.

Cleaver attributed the fall to expenditure, including on Lightbox, as well as volatile market conditions, although he said the biggest markets for diamonds, the United States and China, were robust.

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