Most lab-grown diamonds sold as ethical alternatives are manufactured in coal-powered factories in Henan Province, China. Let us explore some of the implications of that.
There is a version of the lab-grown diamond story that gets told in jewellery showrooms and lifestyle magazines across the world. It goes something like this: lab-grown diamonds are cleaner, kinder, and more ethical than mined stones. No displaced communities. No environmental scarring. No blood on anyone’s hands.
It is a compelling story. It is also an incomplete one.
The question that rarely gets asked — and almost never gets answered — is a simple one: where, exactly, was your lab-grown diamond made?
I have spent over 20 years managing diamond ore processing operations in Botswana. I have overseen and supervised the entire mining value chain for the extraction of some of the world’s finest natural diamonds. I have managed the resources, teams, safety systems, and environmental compliance frameworks necessary for responsible mining. I understand the costs — in capital, discipline, and accountability — to mine a diamond with integrity.
And I know what it costs a country when that industry unravels.
If you follow the lab-grown diamond supply chain past the polished stone and the retailer’s ethical promise, past the reactor and the marketing brochure, you will, in most cases, eventually arrive in Henan Province in central China. Specifically, Zhecheng County, a place once known for chillies and cattle, is now home to the largest concentration of lab-grown diamond production on earth.
Around 60% of lab-grown diamonds used in jewellery today come from China. Most of those come from Henan. And Henan runs, in substantial part, on coal.
This article is not an argument against lab-grown diamonds. People have legitimate reasons for choosing them, including budget, preference, and principle. I respect every one of those reasons. What is questionable is the claim that buying a lab-grown diamond is automatically, inherently, the ethical choice. That claim requires evidence. And the evidence, right now, points in a complicated direction, more especially for China and India, which currently account for more that 70% of lab-grown diamonds in jewellery.
Follow the money. It leads to Henan.
The Ethical Question Nobody Is Finishing
Lab-grown diamond marketing has mastered the half-sentence. No mining required. Conflict-free. Sustainably created. These phrases do real work — they answer the concerns consumers carry into the showroom and send them out feeling good about their choice.
But an ethical claim is only as strong as what it actually measures.
“No mining” tells you where the diamond was not made. It says nothing about where it was made, what powered the reactor that grew it, who operated the facility, under what labour conditions, and whether any independent body has verified any of those answers.
When you buy a natural diamond from Botswana, that stone moves through one of the most audited supply chains in the extractive industries. The Kimberley Process Certification Scheme, although imperfect, tracks rough diamonds from mine to market. De Beers’ Best Practice Principles — a framework I worked within for over two decades — sets out binding requirements on environmental performance, labour standards, health and safety, and community impact. The Mining Association of Canada’s Towards Sustainable Mining Protocols require verification of the same requirements by a different independent body. The ISO 14001 and ISO 45001 certification standards are used to ensure robust environmental and safety management systems. Third-party verifiers check compliance. No standard is perfect, but the biggest benefits come from system documentation, continuous external verification, and requirements for continual improvement. Certifications are monitored with surveillance audits between the certification audits.
Ask your lab-grown diamond retailer for the equivalent. Ask them which factory produced your stone. Ask them what energy source powers that factory. Ask them who audited the labour conditions on the production floor.
In most cases, you will not get a satisfactory answer.
The lab-grown industry has grown very fast, and ethical marketing has outpaced the verification infrastructure, so that the claims have outrun the evidence. Consumers are being asked to take a promise on faith.
The ethical question is not whether it is mined or lab-grown. The ethical question is: can you prove it?
From Chilli Beef to Diamond Capital — The Rise of Henan Province
Zhecheng County in Henan Province, central China, did not set out to disrupt the global diamond industry. For most of its history it was agricultural — known regionally for chillies and cattle. What transformed it was a combination of industrial heritage, scientific tenacity, and sustained government support that most diamond-producing nations simply cannot match.
Henan had a head start. The province built its synthetic diamond expertise over decades in the industrial sector — manufacturing diamonds for drilling equipment, cutting tools, and abrasives. These were not jewellery stones. They were workhorses. But the manufacturing infrastructure, the technical knowledge, and crucially, the scale, were already in place.
The breakthrough came when Henan researchers developed the six-sided top press — a production innovation that gave Chinese manufacturers a decisive advantage in efficiency and scalability over competing HPHT methods. That single technological edge compressed what might have taken decades of gradual market entry into a rapid, government-backed expansion into gem-quality stones.
The Chinese mantra that emerged from this period captures the hierarchy plainly: “The global lab-grown diamond industry looks to China. China looks to Henan.”
Today, the numbers bear that out. China accounts for an estimated 50 to 60 percent of global lab-grown diamond production — a share it has held consistently from 2021 through to the present. India is the next largest producer at roughly 25 to 30 percent and growing. The United States sits at around 12 to 15 percent, focused more on innovation than volume. Everyone else — Singapore, Russia, Europe combined — accounts for the remainder.
This is not a diversified global industry. It is a highly concentrated one, dominated by a single country, centred on a single province, built on infrastructure that existed long before the words “ethical luxury” entered the marketing vocabulary of Western jewellery retailers.
Major producers operating out of this ecosystem include Ningbo CrysDiam Industrial, Zhengzhou Sino-Crystal Diamond, and Henan Huanghe Whirlwind — names that might not appear on the certificate of authenticity handed to a consumer in London, New York, or Sydney.
When someone in China celebrates what they describe as “China Power” dismantling the Western monopoly on diamonds, I understand the industrial pride behind that sentiment. But I also know who absorbs the damage when the great elephants fight. It is always the grass. And here, Botswana is the grass.
What Powers That Diamond in Your Ring
Here is a fact that rarely appears in a lab-grown diamond retailer’s marketing materials: Henan Province, the epicentre of global lab-grown diamond production, runs its industrial base predominantly on coal.
Growing a diamond in a CVD or HPHT reactor is not a passive process. It is energy-intensive manufacturing. The reactors run continuously, at high temperatures, under sustained pressure or in precisely controlled chemical environments. That electricity has to come from somewhere. In Henan, as in much of China’s industrial heartland, it comes largely from coal-fired power stations.
China is not hiding this. It accounts for approximately 33 percent of global carbon emissions — more than any other nation on Earth. Its per capita CO₂ output is 7.4-8 tonnes annually. Henan, a heavy-industrial province, is not among China’s cleaner regions.
Now consider Botswana. A country contributing roughly 0.02 percent of global emissions. Per capita CO₂ output of 2.4 to 3 tonnes annually. A natural diamond industry that operates under documented environmental management systems, ISO 14001 certification frameworks, and externally verified sustainability reporting.
I am not claiming that natural diamond mining carries no environmental cost. It does — I have worked inside that system long enough to know exactly what it demands of the land. But I am asking a pointed question: why should a child in Botswana bear the economic consequences of a purchasing decision made in the name of environmental responsibility, when that decision redirects spending toward coal-fired factories in a country that produces more than a third of the world’s carbon emissions?
The carbon argument for lab-grown diamonds is not false. It is conditional. A lab-grown diamond produced in a facility that runs entirely on verified renewable energy has a meaningfully different footprint from one grown in a Henan reactor powered by the provincial grid. The problem is that most consumers cannot tell the difference — and most retailers are not helping them find out.
Six in ten lab-grown diamonds come from China. Until you can trace your specific stone to a specific factory with a verified renewable energy supply, the environmental claim is a hypothesis, not a guarantee.
The Towns That Powered Botswana — And What They Look Like Now
I have lately walked through the streets of Jwaneng.
It has changed. Mine houses that once held families — engineers, operators, technicians, the people who built some of the most productive diamond processing operations on earth — sit empty and overgrown. Last week I visited Orapa, where I began my career in the diamond industry more than twenty years ago. Orapa has always been a quiet town. But this time the silence was different. It was the silence of a place that has accepted something it does not yet know how to name.
Empty houses. Empty streets. Faces strained with worry. My former colleagues’ sure-footed strides of national pride have now been replaced by something slower and heavier.
These two towns powered Botswana. What we produced at Jwaneng and Orapa did not stay in the mine. It travelled to every corner of the country. It paid the salaries of park rangers protecting elephants in the Okavango Delta from poachers crossing from neighbouring countries. It funded nurses in rural clinics and hospitals. It built schools, roads, and the institutional confidence of a country that had transformed itself from one of the poorest nations at independence to a middle-income economy in a single generation — one of the most remarkable development stories Africa has ever produced.
I recently visited a clinic in Sese village near Jwaneng. The clinic had run out of cards for writing consultation notes. Patients were asked to bring their own piece of paper. The revenue from diamonds has gone.
I want to be honest about my own role in this. In our obsession with efficiency and productivity — and we were genuinely excellent at both — we failed to spot the seismic changes sweeping through the industry. We were playing the short game exceptionally well while the long game shifted around us. In a way, this applies to the whole natural diamond industry.
I used to read the famous words of former Nokia CEO Stephen Elop with detached amusement. Speaking of Nokia’s collapse, he said: “We didn’t do anything wrong, but somehow, we lost.” I understand those words now in a way I did not before. The Nokia executives were not incompetent. Neither are we as Batswana. But efficiency without strategic agility is a trap. Business is an infinite game. You cannot play it with a finite mindset.
The revenue that once moved through Jwaneng and Orapa — through Botswana’s processing plants, through government coffers, through every sector of the Botswana economy — is now moving through Henan Province. That is not a metaphor. It is a transfer of economic consequence, measurable in GDP, in employment, in the presence or absence of simple provisions such as prescription cards at a rural clinic.
The people who choose lab-grown diamonds did not intend this outcome. But intention does not determine impact.
The GDP That Tells the Whole Story
Numbers have a way of cutting through narrative. So let us look at the numbers.
Henan Province — the geographic heart of global lab-grown diamond manufacturing — has a GDP exceeding 800 billion US dollars. It is one of China’s most populous and industrially productive provinces, growing at a consistent rate above five percent annually. The synthetic diamond ecosystem it has built is one component of a vastly diversified industrial economy. If lab-grown diamonds disappeared tomorrow, Henan would absorb the loss without structural damage.
Botswana’s GDP in 2025 was approximately 19 billion US dollars, and contracting. The diamond sector accounts for roughly 70 to 80 percent of export earnings and a substantial share of government revenue. There is no comparable diversification buffer. When diamond revenues fall, the consequences are immediate and direct for public services, household incomes, and national development capacity.
This is the wealth transfer that the lab-grown diamond conversation almost never names.
Buying a lab-grown diamond does not hurt a faceless corporation. Debswana, the mining company at the centre of Botswana’s diamond economy, is 50 percent owned by the Government of Botswana. That government stake is not a technicality — it is the mechanism through which diamond revenues become school fees, medical supplies, infrastructure, and the institutional capacity of a functioning state.
The beneficiary on the other side of the transaction is a manufacturing province in the world’s second-largest economy, already producing coal-powered industrial diamonds at scale, already backed by government subsidies, already operating inside an economy that needs no rescue from Western consumer spending.
The consumer who chooses a lab-grown diamond, believing they are making a progressive, responsible choice, may be entirely correct — or they may be redirecting economic benefit away from one of Africa’s most successful development stories toward an industrial ecosystem that has no equivalent need for it.
The GDP numbers do not lie. Henan does not need your diamond purchase. Botswana does.
What Botswana’s Diamond Story Actually Is — And Why It Matters
Botswana’s diamond story is not a marketing slogan. It is a verifiable development record spanning six decades.
At independence in 1966, Botswana was among the poorest countries on earth — landlocked, with minimal infrastructure, a cattle economy, and almost no institutional capacity. The discovery and subsequent development of kimberlite deposits at Orapa in 1967 and Jwaneng in 1982 changed the national trajectory entirely. Through the Debswana partnership structure, diamond revenues were channelled into public investment at a scale that few resource-dependent nations have managed with equivalent discipline. The results are documented: declining poverty rates, expanding literacy, a functional public health system, and a democratic governance record that stands apart on a continent where resource wealth more often breeds conflict than development.
I know those standards from the inside. I managed operations under them for over twenty years. The De Beers Best Practice Principles framework covers ethical standards, Kimberley Process compliance, environmental management, labour rights, health and safety, and community engagement. It is audited by independent third-party verifiers. It is binding. It might not be perfect, but it is real, documented, and improving under genuine scrutiny.
The lab-grown industry has no equivalent framework with equivalent reach and equivalent enforcement. Some producers operate responsibly. Many make claims that have not been independently verified. The consumer currently has no reliable way to distinguish between them.
Here is where I must be direct about a mistake I believe the natural diamond industry — and Botswana specifically — has made. The Botswana story is the single most powerful differentiator available to natural diamonds. It is specific, verifiable, emotionally resonant, and impossible to replicate in a factory. No CVD reactor in Henan can produce a stone whose purchase funds a nurse’s salary in a Botswana village.
And yet this story has been underused, shared too freely, and in some cases exploited by producers who have no equivalent story to tell. The Botswana provenance has been allowed to function as a moral umbrella over the entire natural diamond category, including stones from sources with far less credible human rights and environmental records.
The Botswana story is a genuine competitive asset. It is time it was treated like one — owned clearly, told directly, and protected from those who would borrow it without earning it.
What a Genuinely Ethical Diamond Choice Looks Like
Let me be clear about what this article is not arguing.
It is not arguing that lab-grown diamonds are bad. It is not arguing that every consumer who chooses a lab-grown stone is making a wrong or irresponsible decision. Buying a lab-grown diamond because it fits your budget, because you prefer the idea of a manufactured stone, or because you genuinely believe it aligns with your values — all of those are legitimate positions that I respect without reservation.
What I am arguing is that the word ethical carries an obligation. It requires evidence. And right now, the evidence consumers are being offered is largely insufficient.
A genuinely ethical diamond choice — whether natural or lab-grown — looks something like this.
Provenance first. You should be able to identify where your diamond originated — a specific mine or a specific manufacturing facility. Not a country. Not a brand. A verifiable source. For natural diamonds from Botswana, that chain of custody exists and is auditable. For lab-grown diamonds, ask your retailer for the factory name and location. If they cannot tell you, that is information in itself.
Energy verification. If your retailer is making an environmental claim, ask them to substantiate it. Which facility produced it? What is that facility’s energy source? Is that claim independently verified, or is it the manufacturer’s own assertion? A diamond grown in a facility genuinely powered by renewable energy carries a different footprint from one grown on the Henan provincial grid. Those are not the same product.
Labour standards. The “no mining” claim sidesteps rather than resolves the labour question. Diamond manufacturing facilities employ people in conditions that vary considerably across producers and geographies. Independent labour audits — equivalent to what the De Beers BPP framework and Towards Sustainable Mining Protocols require of some natural diamond producers — should be the standard. Ask whether one exists.
Impact traceability. Who benefits from your purchase? In the case of a Botswana natural diamond, the answer runs from the mine through the government’s stake in Debswana, royalties and taxes to public revenue and national development. Close to 85 cents in a dollar goes to the government. That chain is traceable. In the case of a lab-grown stone from an unverified Chinese manufacturer, the development impact is considerably less certain.
Buy what you love. Buy what you can afford. But challenge any claims without verifiable data.
The Choice Is Yours. Make It an Informed One.
I began my career in the diamond industry at Orapa Mine in the early 2000s. I ended it — for now — as Senior Ore Processing Manager at Jwaneng, overseeing operations that contributed directly to over 70 percent of Debswana’s organisational revenue. In between, I managed budgets exceeding 100 million US dollars annually, led teams of over 1,200 people, and worked within a compliance framework that held us accountable on safety, environment, labour, and community impact every single year.
I am not a disinterested observer. I have skin in this story — professionally, personally, and as a citizen of a country whose future is inseparable from what happens to natural diamond demand over the next decade.
But I have tried, in this article, to be honest rather than merely persuasive. The lab-grown diamond industry has built something real. The technology is genuine. The cost reduction is genuine. For millions of consumers, the affordability it offers makes a meaningful difference. I do not dismiss any of that.
What I cannot accept — and what the evidence does not support — is the blanket claim that lab-grown diamonds are the ethical choice, full stop, no further questions required.
Six in ten lab-grown diamonds come from China. The majority of those originate in Henan Province, powered in substantial part by coal. The GDP of that province exceeds 800 billion dollars. Botswana’s GDP, built on natural diamond revenues, stands at around 19 billion dollars and is contracting. The clinic in Sese had no prescription cards. The streets of Jwaneng are quieter than they have ever been.
These are not abstract policy statistics. They are the human consequences of a purchasing decision that is being made, at scale, without full information.
The natural diamond from Botswana carries a story that no reactor can replicate — a story of a country that took a geological accident and turned it, through discipline and partnership, into one of Africa’s most remarkable development achievements. That story deserves to be told clearly, owned fiercely, and verified rigorously.
Make your diamond choice freely. But make it knowing where the money goes, what powers the process, and who bears the cost of your decision. That is what an informed choice looks like. That is what ethical, honestly applied, actually requires.
If you want to go deeper on the full natural versus lab-grown ethical framework, the analysis that anchors this article is here: Are Lab-Grown Diamonds Really More Ethical Than Natural Diamonds? A Nuanced Guide for Conscious Buyers.
The choice is yours. It always was. Just make sure it is genuinely yours — not the retailer’s.
This article is part of the Timeless Finery series on diamond literacy. It is intended to inform purchasing decisions, not to advocate for one type of diamond over another.