Responsible stone mining: what is known, what remains to be verified
Where do stones come from, and under what conditions are they mined? Industrial and artisanal mining, documented risks, legal frameworks and labels: a factual overview.
Key points
| Two worlds | Industrial mines and artisanal or small-scale mines |
|---|---|
| Artisanal | About 40 million people in more than 80 countries (estimates) |
| Artisanal share | About 80% of sapphires, 20% of diamonds and 17 to 20% of gold (estimates) |
| Documented risks | Collapses, mercury, silica, water, child labor |
| Frameworks | OECD principles, Kimberley Process, EU regulation on 4 minerals |
| Keep in mind | No stone is “impact-free”; verifying is worth more than believing |
What does “responsible” mean?
There is no single legal definition of an “ethical” or “responsible” stone. The phrase generally refers to several requirements: respecting human rights and working conditions, ensuring the safety of miners, limiting damage to water, soil and biodiversity, not financing armed conflict, and paying fair income to local communities. Each of these can be checked, to varying degrees.
This page sets out the state of knowledge, without accusing any country, company or seller. It separates what is documented by recognised bodies from what belongs to commercial promise.
Two types of extraction
| Criterion | Industrial mine | Artisanal or small-scale mining (ASM) |
|---|---|---|
| Organisation | Company, licenses, machinery | Individuals, families, cooperatives; often informal |
| Jobs | A few million worldwide | About 40 million people in more than 80 countries; over 150 million depend on it indirectly (estimates) |
| Oversight | Audits possible, but not always carried out | Difficult: remote sites, no registers |
| Typical risks | Major landscape impact, mining waste, displacement of populations | Collapses, mercury (gold), silica, child labor, lack of protection |
According to available estimates, artisanal mining supplies about 80% of the world's sapphires, about 20% of diamonds and 17 to 20% of gold. For many other coloured stones, reliable figures are lacking. These figures are orders of magnitude. It is also important to avoid a misreading: artisanal mining is not “bad” by nature; it is often the only source of income for entire families. The problem is the absence of oversight, rights and protection, not hand labor itself.
The documented risks
- Safety. Collapses, unsupported galleries, drowning in pits, machinery accidents.
- Mercury. In artisanal gold mining, mercury is used to amalgamate the gold; the amalgam is then heated, releasing toxic vapors and polluting rivers. The Minamata Convention on Mercury (adopted in 2013, in force since 2017) asks the states concerned to draw up action plans to reduce this use. This is not a question of collector stones, but of gold jewellery.
- Silica. Quartz and agate dust released during cutting and polishing causes silicosis. A clinical study in Shakarpur, near Khambhat (Gujarat, India), a traditional centre of agate cutting, confirmed silicosis in 85 of 123 suspected workers (about 69%). Prevention programs (wet polishing, ventilation) exist but are not always applied.
- Child labor. At least one million children are estimated to work in mining worldwide; the International Labour Organisation classes this among the worst forms of child labor. NGOs have documented such situations in mica mining in India and Madagascar.
- Water, forests, landscapes. Spoil, sludge, diverted watercourses, deforestation. According to one cited analysis, nearly three quarters of active mining sites overlap areas of high ecological value.
- Conflict and corruption. Organisations such as Global Witness have documented links between some supply chains (diamonds, Burmese jade, tin, tantalum) and violence or armed conflict.
Existing frameworks
| Framework | What it covers | Limits |
|---|---|---|
| OECD Due Diligence Guidance on responsible supply chains of minerals (2011, revised since) | Five-step method for companies sourcing minerals from high-risk areas | Non-binding recommendation in itself |
| Kimberley Process (2003) | Certificate for rough diamonds, to exclude “conflict diamonds” | Narrow definition; independent oversight limited according to several NGOs |
| EU Regulation 2017/821 (applied since 2021) | Tin, tantalum, tungsten and gold: due diligence obligations for importers into the EU | Does not cover gemstones or most collector stones |
| French duty of vigilance law (2017) | Large companies: vigilance plan on human rights and the environment across their supply chain | Targets large companies, not a small seller |
| European directive on corporate due diligence (2024) | Extension to other companies | Its application timetable has been revised: check the current status |
For most decorative and ritual stones (quartz, agate, jasper, fluorite), no law currently requires any check on extraction. This is precisely why the seller's transparency matters. See traceability and origin.
Voluntary initiatives
- The Alliance for Responsible Mining (founded in 2004) developed the Fairmined certification (2009) for gold from artisanal organisations.
- The Responsible Jewellery Council (founded in 2005) certifies jewellery businesses against a code of practices; it does not certify a particular stone.
- Formalization programs help artisanal miners obtain licenses, equipment and access to markets.
These initiatives are useful, but their coverage remains small relative to the size of the market. See labels and certificates: what are they worth?
Verifiable or not?
| What a seller says | What would be needed to verify it |
|---|---|
| “Ethical mining” | An independent audit, named and dated, covering a specific site or supply chain |
| “Fair trade” | A precise label (Fairmined, Fairtrade) with a verifiable license number |
| “Conflict-free diamond” | A Kimberley Process certificate for the rough stone, and documented guarantees for the rest of the chain |
| “Hand-picked, artisanal” | A cooperative name, a location, documents; the mention alone proves nothing |
| “Natural stone” | A sheet naming the material and its treatments; for a valuable piece, a laboratory report |
An absence of information is not proof of wrongdoing, just as a general claim is not proof of good practice. What is reassuring is precise, dated, checkable information, or an honest answer along the lines of “we don't know”.
What can a buyer do?
- Ask the question. Country of extraction, intermediaries, documents available. A clear answer is worth more than a slogan.
- Buy less, but better: a stone you keep for a long time has less impact than ten fleeting purchases.
- Consider second-hand: jewellery and stones already mined, old or passed down.
- Ask about the material and treatments: see our commitments.
- Be honest about your limits. No stone can be declared “impact-free”.
This page covers the sector in general. For what our product listings state (material, treatments, country of origin of the product), see our commitments; for a question about a specific product, write to us.
Frequently asked questions
Are there stones with no environmental impact?
No. All extraction alters a site and consumes energy and water. The impact can be reduced, but not eliminated.
What is a conflict diamond?
Under the Kimberley Process, a rough diamond used by rebel movements to finance a conflict against a legitimate government. Several NGOs consider this definition too narrow.
Is artisanal mining necessarily illegal or dangerous?
No. It can be legal, organised into cooperatives and made safe. It is often informal, however, which exposes miners to risks without protection.
Are decorative stones covered by a due diligence law?
EU Regulation 2017/821 covers only tin, tantalum, tungsten and gold. Gemstones and most collector stones are not covered by this text.
How can you tell whether a stone comes from a controlled mine?
Through precise documents (mine name, certificate, audit), not through a general statement. For most common stones, this information does not exist.
Also read
The meanings mentioned belong to tradition and symbolism. They are neither promises of results nor medical advice. Back to Mineralogy for beginners.