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Lab-grown or natural diamonds? Man-made gems are cheaper – and that might explain why more young people are choosing them over mined ones

  • One in 10 pieces of diamond jewellery sold now contain lab-grown diamonds, and young people feel less stigma when buying one, an expert says
  • Interest in lab-grown diamonds has less to do with personal ethics and more to do with how prices are too high for natural, mined gems, he adds

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Kristy Cullinane, co-founder of lab-grown diamond jewellery company Plum Diamond, says that for her clients, lab diamonds check all the boxes without making any compromises. Photo: Plum Diamond

For California-based engineering technician Heather Lim, the choice to select a lab-grown diamond as the centre stone for her engagement ring was an easy one.

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“When my then-fiancé, now-husband, asked me what I wanted in an engagement ring, I made it pretty clear that I didn’t want a natural diamond that came from a diamond mine,” Lim says.

“For me, there’s too much baggage associated with a diamond that comes from a mine, and that’s all I’d be thinking about every time I looked at it on my hand.”

Lim is not alone in voicing her worries about the ethics of natural mined diamonds – those concerns have taken hold across the diamond industry.
Congolese workers search for rough diamonds in the Kangambala mine in Lungudi in Kasai in the Democratic Republic of Congo in 2015. Photo: Getty Images
Congolese workers search for rough diamonds in the Kangambala mine in Lungudi in Kasai in the Democratic Republic of Congo in 2015. Photo: Getty Images

New York-based industry analyst Paul Zimnisky specialises in tracking global diamond supply and demand. He estimates that lab-diamond jewellery now makes up 10 per cent of the total market for diamond jewellery – with consumer demand particularly strong in the US, though less in China.

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Analysts from market research company Allied Analytics LLP estimate that the global lab-grown diamond market will reach almost US$50 billion by 2030.

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