Natural vs Lab-Grown Diamonds: Their Impact on the Environment
Updated: 6 days ago
A diamond can be recovered from a natural deposit or grown in controlled equipment. Both routes produce real diamonds, but their environmental burdens differ. Natural diamonds require the excavation and processing of diamond-bearing material; lab-grown diamonds move crystal production into a factory, avoiding the extraction of natural diamond deposits.
Lab-grown diamonds have a clear advantage in reducing disturbance from diamond mining, waste rock and habitat disruption. Direct water withdrawals also tend to be lower when growth equipment uses recirculating cooling. Energy and carbon advantages depend on growth efficiency and electricity supply, while cutting and jewellery manufacture require a separate look at processing, metals and material efficiency.[1][2][9]
Figure 1. Natural diamond mining, laboratory growth and a polished diamond. AI illustration.
Contents
1 Two production routes, different environmental burdens
Natural diamonds have already formed in geological environments. People recover them from rock, river sediments or seabed gravels before cutting and polishing them. Excavation, material handling and mineral processing are central environmental concerns along this route.
Lab-grown diamonds begin with a seed crystal. High-pressure, high-temperature growth (HPHT) uses presses and heating systems; chemical vapour deposition (CVD) uses a reaction chamber, carbon-containing gases, a vacuum and an energy supply. Both reduce reliance on natural diamond deposits, while growth, cooling and subsequent treatment still require electricity and other inputs.[13]
Figure 2. Natural and lab-grown diamond production routes and their main environmental considerations. Cutting and jewellery manufacture are shared stages.
Environmental aspect | Main difference between the routes | Comparison |
Land and ecosystems | Natural: extraction and processing of diamond-bearing material. Lab-grown: crystal growth in factory equipment. | Lab-grown production clearly reduces the direct disturbance associated with extracting natural diamond deposits. |
Energy and carbon | Natural: excavation, material transport and processing. Lab-grown: heating, reaction systems, vacuum and cooling. | Efficient equipment and low-carbon electricity favour lower emissions from lab-grown production; individual supply chains still need comparison. |
Water and pollution | Natural: washing, dust suppression and mine-water management. Lab-grown: cooling, cleaning and replacement water. | Lab-grown production with recirculating cooling tends to withdraw less water directly. A broader comparison also includes water used in electricity generation, material production and cutting. |
Cutting and jewellery manufacture | Both require cutting, polishing, transport, metals, setting and finishing. | These stages have no fixed winner based on diamond origin. Energy, yield and metal choices are more direct drivers. |
For the origins of both materials, see Where Do Diamonds Come From? Comparing the Origins of Natural and Lab-Grown Diamonds. The growth equipment is explained in CVD vs. HPHT Lab-Grown Diamonds: A Complete Guide to the Two Technologies.
2 Land and ecosystems: the clearest difference is extraction
A mine occupies more than its excavation area
Roads, processing plants, waste-rock storage and water-management facilities extend a mine’s footprint beyond the pit. Removing soil and vegetation can alter runoff and animal movement. Geology, ore grade and the surrounding ecosystem affect the amount of material moved and land occupied for each carat recovered.[3][4]
Methods also differ. Open-pit and underground mines use different excavation systems and surface facilities. Alluvial and offshore recovery move sediments. For marine operations, the area of seabed disturbed, the effects on bottom-dwelling organisms and subsequent recovery monitoring are important assessment factors.[5]
Rehabilitation requires long-term water and ecological management
Mine rehabilitation may involve saving and replacing topsoil, stabilising landforms, managing drainage, restoring vegetation and monitoring water and wildlife. Outcomes depend on the original habitat and the results achieved. De Beers itself notes that land area alone does not measure biodiversity outcomes or ecological equivalence.[4]
Canada’s Diavik mine completed its final production in March 2026 and entered decommissioning and reclamation. Rio Tinto explains that, after lake water returns to the pits, water quality must be tested before reconnection to Lac de Gras. Environmental responsibilities therefore continue after production ends.[6]
Lab-grown diamonds reduce the need to extract natural diamond deposits
Growing a crystal in equipment removes the deposit-extraction and mineral-processing stages required to obtain a newly mined diamond. This is the clearest land and ecosystem advantage of lab-grown production. Factories, equipment, electricity and materials still have environmental footprints, including those from equipment metals and energy infrastructure.[1][2]
Figure 3. Direct land and ecosystem impacts of the two routes. Lab-grown production avoids natural diamond-deposit extraction; the assessment still includes factories, energy and equipment supply.[2][4][5]
Comparison: lab-grown diamonds clearly reduce mining disturbance
For someone concerned about new excavation, waste-rock movement or disturbance of riverbeds and seabeds to obtain diamonds, lab-grown diamonds are the lower-impact choice for those activities. The process directly avoids that set of mining operations. Conservation and rehabilitation can improve the natural route, while the lab-grown route reduces demand for diamond-deposit extraction at source. A full biodiversity assessment also considers electricity generation, materials and the locations of factories.
Mine excavation and material handling. AI scene illustration.
3 Energy and carbon: efficiency and electricity determine the advantage
Lab-grown diamonds have a practical route to lower energy-related impacts: grow usable crystals efficiently and supply growth and cutting with low-carbon electricity. Natural diamonds require energy for excavation, material handling and processing. The eventual difference depends on energy per finished carat and the emissions associated with that energy.
Energy: efficient growth equipment can use less than mining
A 2021 study in Energies compared earlier mining data with specific growth equipment. Its HPHT example used approximately 36 kWh per rough carat; mining-energy figures for ALROSA and De Beers were about 96 and 150 kWh respectively. The CVD figures and equipment examples covered approximately 77–215 kWh. These examples show that efficient growth can use less energy, while less efficient equipment can exceed the mining figures.[1]
These are production-stage examples, with mining inputs converted into energy units. For a current product comparison, the year, usable output and cutting yield also matter. HPHT presses and heating, CVD reaction systems, vacuum and cooling, and any subsequent treatment all affect the inputs allocated to a finished diamond.[13]
Figure 4. Production-energy examples from the 2021 study and the conditions affecting carbon performance. Rounded values in kWh per rough carat; these are specific examples rather than 2026 industry averages or complete product carbon footprints.[1][8]
Carbon: low-carbon electricity strengthens the lab-grown route
A carbon footprint expresses greenhouse-gas emissions as carbon dioxide equivalents (CO₂e). For the same electricity use, a lower-carbon supply produces fewer electricity-related emissions. Higher equipment efficiency also reduces electricity per finished stone. Efficient growth and low-carbon electricity therefore work together. Energy-intensive growth on a high-carbon grid can narrow that advantage or reverse the result in a particular comparison.[8]
Natural mines can also improve machinery efficiency, electrify equipment and change their electricity supply. De Beers identifies these approaches in its climate disclosures.[7] A useful carbon comparison is therefore between specific supply chains, with efficient equipment and low-carbon electricity creating favourable conditions for the lab-grown route.
How a public product study describes renewable electricity
Ramboll’s 2023 update for Pandora reports 9.17 kg CO₂e for one grown, cut and polished one-carat lab-grown diamond from its specified supply chain. It explains the renewable-electricity accounting for growth and cutting. This illustrates a concrete product result; the report limits its use to the specified products and states that it is not intended for comparisons with competitors.[9]
Renewable electricity may be obtained through on-site generation, purchase agreements or energy-attribute certificates. GHG Protocol’s Scope 2 Guidance distinguishes location-based grid accounting from accounting using contractual instruments. Identifying the method makes the basis of an emissions figure clearer.[8]
Comparison: we support efficient growth powered by low-carbon electricity
We see efficient, low-carbon-powered lab-grown diamonds as a worthwhile direction for reducing emissions. Equipment research and product cases support that improvement pathway. Whether one particular lab-grown diamond has a lower footprint than a particular natural diamond is established by comparing the same finished-product unit and assessment scope.
Diamond growth equipment and its operating environment. AI scene illustration.
4 Water and pollution: recirculating cooling favours lab-grown production
For direct water use at the production site, lab-grown diamonds with recirculating cooling tend to have an advantage. They avoid washing diamond-bearing material, mine dust suppression and mine-water management. Replacement water is mainly associated with cooling losses, cleaning and maintenance. The 2021 energy and water study also estimated lower production-water use in its growth-equipment models than in its mining benchmark.[1]
Figure 5. Water-use pathways for natural and lab-grown diamonds. With recirculating cooling, lab-grown production tends to withdraw less water directly. A broader footprint also accounts for electricity generation, material production and local water scarcity.[1][10]
Site withdrawals and a full water footprint answer different questions
Mine-water needs can include material washing, dust suppression and site-water management. Recirculating factory cooling uses the same water repeatedly, replacing losses such as evaporation and discharge. This is the main reason for expecting lower direct withdrawals in that type of lab-grown production. Cooling systems with high replacement-water needs or factories in water-stressed regions require closer assessment; electricity generation and material production also use water.
The US Geological Survey (USGS) distinguishes withdrawals from consumption. Withdrawal is water taken from a surface or underground source. Consumption includes water evaporated or incorporated into products and therefore unavailable for other immediate uses. Compare the same measure, then consider the source and local water scarcity.[10]
Reuse and discharge management affect both routes
Mines can reduce new withdrawals through reuse. De Beers reports water reuse and recycling efficiency of 73.4% and freshwater withdrawals of 9,918 megalitres for 2025.[4] These operational figures show management progress; comparison per finished stone also requires production volumes and a consistent scope.
Lab-grown production avoids the waste-rock and mineral-processing water management associated with diamond-deposit extraction, reducing those site-specific risks. Factory cleaning, consumables and process residues still need proper treatment. Both mines and factories must manage their actual discharges. Canada’s mining-effluent reporting, for example, includes suspended solids, pH and toxicity testing.[11]
Comparison: recirculating growth tends to have lower direct water needs
Based on the process differences and available research, we consider recirculating lab-grown production more favourable for direct site withdrawals and the water-management burdens associated with diamond mining. That conclusion has specific conditions. A full comparison adds water used in electricity and materials, regional scarcity and discharge quality alongside the volume of water used.
5 Cutting and jewellery manufacture: shared stages, shared improvement levers
Both natural and lab-grown diamonds are cut and polished, then combined with metals to make jewellery. With the same equipment, electricity, material yield and setting methods, these processing stages have no fixed winner based on diamond origin. Processing energy, material efficiency and how the metals are obtained are the most direct improvement levers.
Figure 6. Cutting and jewellery-manufacturing stages shared by both routes. The 50% yield is an illustrative weight conversion; actual yield depends on the rough and cutting plan.
Compare cutting at the same finished weight
Cutting yield is finished weight divided by the rough weight used. To obtain a one-carat polished diamond, a hypothetical 50% yield requires two rough carats; a 25% yield requires four. Both routes need this conversion. Rough shape, internal features, the intended shape and the cutting plan influence actual yield.
For lab-grown production, the share of a batch suitable for its intended use and any subsequent treatment also change the production inputs allocated to usable stones. Stable growth, appropriate cutting plans and less rework improve material efficiency.[13]
For a whole piece of jewellery, include metals and manufacture
Metal extraction and refining, casting, setting, surface finishing, packaging and transport all contribute to a piece of jewellery. Pandora’s public study incorporates its specified diamond data into a ring life-cycle assessment, showing how metals and other stages are counted together.[9] Diamond origin and metal choice are separate material decisions.
Comparison: downstream efficiency matters; earlier advantages still count
Under equivalent processing conditions, these shared stages can be treated as comparable. A producer using lower-carbon electricity, better yield or lower-footprint metals may perform better at that stage. If a lab-grown diamond has already achieved a lower production burden and subsequent processing is similar, the earlier advantage remains part of the overall result.
For jewellery already owned, long-term wear, care, repair and resetting extend the value of existing materials. This applies to both natural and lab-grown diamonds. See How to Clean and Maintain Diamond Jewellery for practical care information.
Diamond inspection and craft work in a workshop. AI scene illustration.
6 How to compare the environmental footprint fairly
Start with the same delivered result—for example, one polished one-carat diamond reaching the same supply-chain stage—then compare land, ecosystems, carbon and water separately. Life cycle assessment (LCA) follows inputs and emissions across product stages so those differences can be assessed within a consistent scope.[9]
Figure 7. A checklist for comparing the two routes. For a “No”, first align or obtain the information shown on the right, then repeat that check. Indicators with comparable data can support a specific conclusion.
Step 1: align the product, stages and finished yield
Check that both datasets describe the same finished weight and supply-chain stage. If one stops at rough production and the other includes cutting and transport, align their boundaries first. For a whole ring, also align metal type, weight and manufacturing scope. Allocation between co-products should use consistent methods.
Step 2: check the year, producer and electricity data
Identify the mine or factory, the reporting year and how electricity emissions were calculated. Ore grade, equipment efficiency, usable yield and grids change over time. Data should correspond as closely as possible to the actual supply chain. Natural production also changes: De Beers reports that its 2025 Scope 1 and 2 emissions were 14% below its 2021 baseline. Production volumes are also needed to interpret a group-level reduction per unit of product.[7]
Step 3: decide which route performs better for each indicator
Compare kg CO₂e over the same scope. For water, distinguish withdrawals, consumption and scarcity impacts. For land and ecosystems, consider occupation, disturbance and recovery. Where one route has a lower impact on a comparable indicator, state its advantage for that aspect. Presenting the results together reveals the lab-grown route’s avoidance of diamond-deposit extraction and the remaining opportunities in energy and water management.[3][10]
7 RAGAZZA’s position on diamonds and environmental value
At RAGAZZA, we support lab-grown diamonds as a way to reduce jewellery’s reliance on the extraction of new natural diamond deposits. Avoiding that excavation, reducing waste rock and limiting habitat disturbance are tangible environmental benefits. Recirculating cooling, efficient growth and low-carbon electricity can extend the advantages to water and emissions.
For customers seeking to reduce the environmental burden of new diamond extraction, we therefore favour lab-grown diamonds. Our position follows from the production routes. Specific claims about a product’s carbon or water savings should be supported by its supply-chain data. Cutting quality, material efficiency and lasting use also matter, bringing environmental considerations together with jewellery made to be worn.
Specific environmental information helps customers understand the improvements they support. The US Federal Trade Commission’s diamond-advertising guidance likewise calls for environmental-benefit claims to have a reasonable basis and clearly explained reasons.[12] We apply that level of accuracy when describing advantages, conditions and product information.
Environmental effects are connected with people’s wellbeing and sourcing responsibilities. For workers and residents, see How Do Diamond Mines Impact the Environment and Local Communities? For blood diamonds, conflict diamonds and sourcing responsibilities, see What Are Blood Diamonds, and How Has the Industry Worked to Combat Their Trade?
Our Lab-Grown Diamonds: Pros & Cons guide also considers budget, quality, uses and preferences for natural origin alongside environmental factors.
8 Frequently asked questions
Q1 Which has a lower environmental impact: natural or lab-grown diamonds?
A: Lab-grown diamonds clearly reduce the disturbance, waste rock and habitat effects associated with extracting natural diamond deposits. With recirculating cooling, direct water withdrawals also tend to be lower; efficient equipment and low-carbon electricity strengthen the carbon case. Cutting and jewellery manufacture still depend on processing and metal choices. RAGAZZA favours lab-grown diamonds as a way to reduce the burden of new extraction.
Q2 Does HPHT or CVD use less electricity?
A: Actual use depends on equipment, operating conditions, usable output and finished yield. Efficiency can differ within the same technology. For a particular product, production data per polished carat are more informative than the HPHT or CVD label alone.[1]
Q3 Why do reported carbon footprints per carat vary so much?
A: Check whether the carat refers to rough or polished material and whether cutting, transport and material supply are included. Then examine the year, electricity supply, data sources and allocation method. Once those are aligned, the figures describe a comparable delivered result.
Q4 How does renewable electricity help a whole piece of jewellery?
A: It lowers the electricity-related emissions of the stages it covers. The complete piece also involves metals, equipment, consumables, processing and transport. Check which stages the renewable-electricity claim covers, then interpret it within the complete product assessment.[8][9]
Q5 How does mine rehabilitation differ from avoiding extraction?
A: Rehabilitation addresses land already disturbed through measures such as landform stabilisation, revegetation and water or ecological monitoring. Lab-grown production avoids the extraction of a natural diamond deposit to obtain the crystal. These approaches work through restoration and reduced demand for extraction respectively; their ecological value is assessed through actual impacts and recovery outcomes.[4][6]
9 References
Peer-reviewed study using earlier mining data and specific HPHT/CVD equipment. Growth-water figures include equipment-model estimates; production-stage comparisons are not full life-cycle water footprints.
GIA background on mining, crushing and diamond recovery technology.
Peer-reviewed scenario-model study; used for assessment dimensions, not as current measured product emissions or a forecast presented as fact.
Company-reported operational data, including water reuse, withdrawals and biodiversity-assessment considerations.
Company description of seabed biodiversity and recovery monitoring, including benthic communities and sediment sampling.
Company information on final production, decommissioning, lake-water return and water testing.
Company-reported Scope 1 and 2 progress against a 2021 baseline; not a per-carat product footprint.
Guidance on purchased-energy emissions and contractual instruments. Consultation proposals are not treated as adopted rules.
Commissioned by Pandora. The 2022 study was verified; the 2023 calculation update was not separately reviewed. The 9.17 kg CO₂e figure is for its specified lab-grown diamond supply chain, not a competitor comparison.
USGS definitions distinguishing withdrawals, consumption and other water-use measures.
Official effluent reporting. Combined metal- and diamond-mine statistics are not treated as diamond-only performance.
Official guidance on substantiating environmental-benefit claims in diamond advertising.
GIA background on growth equipment, processes, batch growth and subsequent treatment.
