Land sovereignty in the mining context refers to the right of states, sub-national jurisdictions, and Indigenous peoples to determine how mineral resources beneath their territories are explored, extracted, and traded. For the gem trade, sovereignty is not a single doctrine but a stack of overlapping rights: state ownership of subsurface minerals in most civil-law jurisdictions, common-law severance of mineral rights from surface estates in the United States and parts of Canada, treaty- and constitution-based Indigenous title, and international standards developed under the United Nations Declaration on the Rights of Indigenous Peoples (UNDRIP) and ILO Convention 169.

The state as owner

Most countries vest subsurface mineral rights in the Crown or the state. Australia, Canada, Brazil, Tanzania, Madagascar, and Myanmar all retain state ownership of minerals, granting concessions through licensing regimes that vary in transparency and capacity. The miner holds a leasehold or licence interest that is conditional on royalties, environmental performance, and increasingly on social-licence requirements such as community development agreements. The United States is unusual in permitting private surface owners to retain or sever the mineral estate, with severed-mineral title litigated through state courts and the federal Bureau of Land Management overseeing federal lands.

Indigenous rights and free, prior and informed consent

UNDRIP, adopted by the UN General Assembly in 2007, articulates the principle of free, prior and informed consent (FPIC) for any project affecting Indigenous lands, territories, or resources. ILO 169, in force since 1991, imposes binding consultation obligations on state parties. Together these instruments shape the modern legal landscape, although their application varies sharply by jurisdiction. Canadian Supreme Court jurisprudence in Tsilhqot'in Nation v. British Columbia (2014) recognised Aboriginal title as a beneficial interest in land, and the duty to consult and accommodate is now part of project approval at every stage. Australian native title since the Mabo (1992) decision and the Native Title Act 1993 requires Indigenous Land Use Agreements for mining on native-title land. New Zealand applies Treaty of Waitangi principles. In the United States the legal position varies by tribe and treaty.

Mining and the Kimberley Process

For the diamond trade specifically, the Kimberley Process Certification Scheme has, since 2003, addressed the narrow question of conflict diamonds – rough originating from rebel-controlled territory used to finance armed conflict against legitimate governments. The KPCS is a state-to-state scheme and does not address Indigenous consent, environmental harm, or human-rights abuses by state actors, which is why civil-society organisations and several producers have pressed for broader due-diligence standards through the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas. Coloured-stone supply chains have no equivalent of the KPCS and rely on voluntary standards from the Responsible Jewellery Council, AGTA, and ICA member commitments.

Artisanal and small-scale mining

Roughly 80 per cent of the world's coloured stones come from artisanal and small-scale mining (ASM), much of it operating in legal grey zones. Madagascar's sapphire fields, Mozambique's ruby and tourmaline deposits, Colombia's emerald belt, and Sri Lankan gem gravels all combine some legal licensing with widespread informal extraction. Land-sovereignty questions intersect with ASM through formalisation programmes, which try to bring informal miners into the licensing system, and through the recognition of customary land tenure in jurisdictions where statutory law has historically ignored it. The tension is real: formalisation can deliver tax revenue, environmental oversight, and miner safety, but it can also displace customary users who lack the capital, literacy, or political access to obtain licences.

The Argyle precedent

The closure of the Argyle diamond mine in Western Australia in 2020 brought a continuing land-sovereignty obligation back to the foreground. The site sits on Miriuwung-Gajerrong country, and the original 1980 mining agreement preceded the recognition of native title. Rio Tinto's mine-closure obligations, negotiated under a later participation agreement, included rehabilitation, employment commitments, and cultural-heritage protection going beyond the original lease terms. The Argyle case is a long-running illustration of how sovereignty norms evolve over the life of a mine and how project closures themselves become sites of negotiation.

The trade's exposure

For dealers and retailers, sovereignty is not an abstract concern. Provenance documentation, export licensing, and sanctions compliance now require evidence of legal title at the point of extraction. The Myanmar ruby trade has been the highest-profile example: US and EU sanctions following the 2021 military takeover targeted Myanmar's gem-sector revenue, and dealers worldwide have had to demonstrate that Burmese rubies in inventory either pre-date the sanctions period or come through compliant chains. Sovereignty disputes elsewhere – Sri Lankan licensing reforms, Mozambican concession reviews, Colombian emerald formalisation – all eventually reach the wholesale market as documentation requirements and price differentials between certified and uncertified material.

Toronto's vantage point

From a Canadian retail perspective, the Mackenzie Valley and Nunavut diamond projects (Diavik, Ekati, Snap Lake, Gahcho Kue) have been negotiated under impact and benefit agreements with Indigenous parties since the late 1990s, and the diamonds carry mine-of-origin designations that make the sovereignty story visible at the showcase. The lesson the trade has absorbed is that durable supply requires durable consent, and that the cheapest stone today is not the cheapest stone over a five- or ten-year horizon if the legal foundation underneath it is contested.