The jewellery industry does not talk about this honestly. Brands that sell mined diamonds avoid it entirely. Brands that sell lab-grown diamonds oversell it. The phrase "conflict-free" gets used as though the only harm diamond mining causes is funding armed groups. It causes a great deal more than that, and it has been doing so for over a century.

This article is not a sales pitch. It will not tell you that buying a lab-grown diamond makes you an environmentalist. It will tell you what both options actually cost the world, and let you decide what that means for you.

250tonnes of earth movedFor every single carat of gem-quality diamond extracted from a major open-pit mine.Source: Diamond industry operational data
90%of rough diamonds cut in IndiaSurat alone processes most of the world's rough supply. Indian buyers sit closer to this supply chain than almost anyone.Source: Gem and Jewellery Export Promotion Council
57kgCO₂ per carat, miningAverage carbon emissions per polished carat from conventional open-pit mining operations, excluding transport.Source: Trucost Environmental Assessment, 2019

What Mining Actually Does to the Ground

The Jwaneng mine in Botswana is one of the largest diamond mines on Earth. It is roughly three kilometres long, two kilometres wide, and 400 metres deep. A hole that size does not heal. It does not fill back in when the mine closes. The overburden — rock and soil displaced to reach the kimberlite pipe below — gets piled around the site and stays there. For every carat of gem-quality stone that comes out of a deposit like Jwaneng, approximately 250 tonnes of material had to move first.

Water use is significant. Open-pit mining requires continuous dewatering to keep operations running in areas with groundwater. In water-stressed regions of southern Africa and parts of Canada, this draws down local aquifers that communities and ecosystems depend on. The water that is used does not get returned in any usable form.

Carbon output from mining runs through diesel-powered equipment, explosives, ventilation systems, and the transportation of rough stones from remote mines to cutting centres, often across multiple continents before reaching a polishing facility in Surat or Antwerp. The Trucost assessment commissioned in 2019 placed the average carbon footprint of a mined polished diamond at approximately 57 kilograms of CO2 per carat. That number is an average across operations of varying efficiency. Some mines are worse.

"A hole three kilometres wide and 400 metres deep does not get described as environmental damage in most jewellery marketing. It gets described as heritage."

The Human Cost Alongside the Environmental One

The Marange diamond fields in Zimbabwe were discovered in 2006. Within two years, human rights organisations had documented mass displacement of local communities, state violence against artisanal miners, and forced labour conditions in the fields. Diamonds from Marange entered global supply chains certified under the Kimberley Process. They passed. They were sold.

The Kimberley Process was designed to prevent diamonds from funding armed conflict. It was not designed to address killings carried out by government forces, community displacement, or labour exploitation. It does not cover those things. Diamonds with valid Kimberley Process certificates can come from operations where none of the above protections existed.

Artisanal mining accounts for a significant share of global rough diamond production. In the Democratic Republic of Congo, in Sierra Leone, in Angola, artisanal miners work without safety equipment, without contracts, and without legal protection over land they have often occupied for generations. The stones they find travel the same supply chains as those from major corporate operations.

On Botswana specifically: The Botswana government has a genuine revenue-sharing arrangement with De Beers through Debswana, and diamond revenues have funded significant social infrastructure. The picture in Botswana is more complex than a straightforward harm narrative. This is worth stating because honest accounting matters in both directions.

Environmental Footprint Comparison

Mined Diamond

Documented costs per carat at scale

Land DisruptionPermanent. Open-pit mines are not remediated in any meaningful timeframe. Surrounding ecosystems are disrupted for decades.
Earth MovedApproximately 250 tonnes per polished carat. This figure does not include waste rock from underground operations.
Carbon EmissionsAverage 57kg CO2 per polished carat across major mining operations, excluding intercontinental transport.
Water UseSignificant. Continuous dewatering of mines draws down local groundwater. Water used in processing is not returned clean.
Community ImpactVariable. Documented displacement and labour exploitation in multiple countries. Revenue sharing models exist in some operations.
Supply Chain LengthMine to polisher to wholesaler to manufacturer to retailer. Stones cross continents multiple times before reaching a buyer.
Lab-Grown Diamond

Honest accounting, no overclaiming

Land DisruptionNear zero. A laboratory facility occupies a fraction of the footprint of even a small mine. No overburden, no tailings ponds.
Earth MovedNone. Growth occurs inside a sealed chamber. No excavation, no displacement of rock, no remediation needed.
Carbon EmissionsDepends entirely on the energy source. Renewable-powered facilities: significantly lower than mining. Coal-grid facilities: lower, but by a smaller margin. Ask your supplier.
Water UseModerate. CVD chambers require cooling. Water is typically recycled within closed-loop systems. Not comparable to mine dewatering.
Community ImpactNo displacement. No artisanal labour exploitation. Lab workers are employed in controlled industrial environments with standard labour protections.
Supply Chain LengthLaboratory to cutting centre to manufacturer. Significantly shorter. VAIMA discloses the growth method and laboratory source on every IGI certificate.

The Honest Caveat on Lab-Grown Energy

CVD diamond growth requires a sustained microwave energy input over several weeks per batch. That energy has to come from somewhere. If it comes from a solar farm or a hydroelectric facility, the carbon footprint of the finished stone is very low. If it comes from a coal-powered grid — which is the energy profile of many industrial facilities in China and parts of India — the footprint is reduced compared to mining, but the gap is smaller.

This is the part lab-grown brands typically skip. VAIMA does not skip it because buyers who are making an environment-conscious choice deserve to know what they are actually getting.

The best available comparative data, from the Trucost study commissioned in 2019, found that the carbon footprint of lab-grown diamonds from leading producers was approximately three times lower than mined diamonds at comparable grades. That figure assumes an average energy mix. Producers using renewable energy report numbers significantly better than this. Producers using coal-heavy grids report numbers that are better than mining but not dramatically so.

When you buy a lab-grown diamond, ask where it was grown and what energy profile the facility runs on. A producer who cannot answer that question is not a producer who has thought seriously about the environmental dimension of their product.

What This Means for an Indian Buyer

India processes more than 90 percent of the world's rough diamonds. The Surat cutting industry employs hundreds of thousands of people. This is not a distant supply chain problem. It is part of the economic fabric of Gujarat, and Indian buyers are part of it whether they think about it or not.

The movement of a rough diamond from a mine in Botswana or Russia, through a trading hub in Antwerp or Dubai, to a cutting workshop in Surat, and then to a manufacturer in Mumbai before it reaches a buyer in Bangalore — that journey leaves a footprint at every stage. A lab-grown diamond grown in a facility in India or the United States, cut and set locally, and delivered to the end buyer has a supply chain that is a fraction of that length.

Shorter supply chains are also more auditable. When something goes wrong — or when a buyer wants to know that nothing did — a six-step international chain is harder to verify than a two-step domestic one.

What VAIMA Claims and What It Does Not

VAIMA does not claim that lab-grown diamonds are zero-impact. They are not. We do not use the word sustainable as a blanket description of what we sell, because sustainability is a claim that requires continuous verification, not a label you apply once and leave alone.

What VAIMA does claim: every diamond we use is IGI-certified, CVD-grown, and sourced from facilities that disclose their production method. The conflict risk is zero. The land impact is near zero. The community displacement risk is zero. The carbon footprint is meaningfully lower than mining, and we continue to work toward sourcing from facilities with verified renewable energy use.

That is what we can stand behind. We will not say more than that.