Ask Onix
Lab-grown diamonds trigger price collapse for mined gems
The global diamond industry is undergoing a seismic shift as lab-grown alternatives slash prices for natural stones, forcing closures in traditional mining hubs like Sierra Leone. Retail prices for polished natural diamonds have plunged 40% over the past four years, driven by the rapid expansion of factory-produced diamonds that are chemically identical but cost up to 70% less.
Sierra Leone's diamond heartland faces crisis
In Kono, Sierra Leone's diamond-rich region, the fallout is stark. The country's largest mine, Koidu Holdings, shut down last year after a bitter pay dispute, eliminating 1,000 jobs. While the company cited dispute costs and security concerns, industry insiders privately acknowledge the global market downturn played a decisive role.
Governor Augustine Shekho describes the economic ripple effects: "Lower diamond values have slashed miners' earnings, stifled investment, and weakened local economic activity." The region, once the lifeblood of Sierra Leone's diamond trade since the 1930s, now grapples with dwindling opportunities.
Artisanal miners left scrambling for scraps
In the sweltering heat of an informal mine in Kono, foreman Daniel sifts through gravel with five others, searching for fragments. "We wash the gravel in water," he explains. "If there's a diamond or a bright stone, we spot it." But finds are rare. "Sometimes, you work all year and find nothing. It's by God's grace."
The closure of Koidu Holdings has pushed more workers into unregulated mining, where pickings are meager and uncertainty reigns. "We're just dreaming, really," Daniel admits. "But we still hope."
A legacy of conflict and unfulfilled promises
Diamonds have long been a double-edged sword for Sierra Leone. In the 1990s, Kono became a battleground during the country's brutal 11-year civil war, fueled by control over diamond wealth. Governor Shekho recalls the atrocities: "They shot at random, killed people, burned the entire town. My mother was a victim." Over 50,000 died, and hundreds of thousands were displaced or maimed.
The 2003 Kimberley Process, a UN-backed certification scheme, aimed to curb the trade in "conflict diamonds," but reputational damage lingers. "To me, diamonds have failed us," says Abubakar Amara, a Kono primary school teacher. "What have they done for our community? We're still considered poor."
Industry seeks redemption through ethical sourcing
De Beers, the British diamond giant, is attempting to rewrite the narrative with Gemfair, a project offering artisanal miners in Sierra Leone equipment, training, and transparent pricing. "We connect them to markets, empower them with skills," says local representative Raymond Alpha. The initiative also serves a reputational purpose, allowing retailers to trace diamonds' origins.
"Consumers increasingly want to know where their diamonds come from," says De Beers' David Johnson. "Just as they do with coffee or chocolate, they want to know the story behind their purchase."
Lab-grown diamonds surge as ethical and economic choice
The lab-grown diamond market, valued at $29.5 billion last year, is projected to reach $91.9 billion by 2034. In the U.S., 61% of engagement rings now feature lab-grown stones, up from 30% in 2022, according to The Knot's 2026 Real Weddings Study. The shift is driven by affordability and evolving values, with 40% of couples prioritizing lab-grown stones.
Rohit Mehta, CEO of India-based Forlink Ventures, highlights the appeal: "People are more conscious of climate change and over-extraction. Lab-grown diamonds are ethical and environmentally friendly."
However, critics argue the environmental benefits are overstated. Lab-grown diamonds require massive energy inputs. "These reactors run at the temperature of the sun," says U.S. environmental consultant Stanley Mathuram. "They're like data centers."
Retailers adapt as natural diamonds lose ground
Jewelry retailers are adjusting to the new reality. Doug Meadows, co-founder of David Douglas Diamonds in Atlanta, notes that lab-grown stones now dominate sales. "People want the biggest bling they can afford. The diamond used to be the expensive part, but now gold is $4,500 an ounce, making the mounting more costly than the stone."
Meadows sympathizes with the narrative of natural diamonds but admits it's a tough sell. "Educating consumers about the value of natural diamonds is a new challenge. I'm not sure how we do it yet."
Hope fades in Sierra Leone's diamond pits
Back in Kono, Daniel resumes digging after another fruitless search. "No diamond here," he murmurs, staring into the mud. "I'll try my luck again." For miners like him, the dream of a life-changing find grows dimmer as the global diamond market pivots toward lab-grown alternatives.
