Lithium Mining: Mines, Companies and Markets

Hard rock, brine and clay: where lithium comes from

Lithium mining happens in three quite different kinds of deposit, and the kind decides the cost, the timeline and the environmental questions a project faces.

Hard rock

Most of Australia’s output, and projects in Canada, Zimbabwe and the Democratic Republic of the Congo, mine pegmatites rich in spodumene. It is conventional open-pit mining: blast, crush, and concentrate the spodumene. Greenbushes in Western Australia, owned by Albemarle, Tianqi and IGO through Talison Lithium, is the best-known example. Our list of the biggest lithium mines in the world ranks it against the others.

Brine

In the salt flats of Chile, Argentina and Bolivia, lithium is dissolved in underground brine. Producers pump it into evaporation ponds and let the sun concentrate it over many months before processing. Costs per tonne can be low, but water use in some of the driest places on earth is the main point of contention. Our step-by-step piece on how lithium is extracted from brine walks through the process.

Clay

Some deposits, mainly in Nevada, hold lithium in clay. Lithium Americas’ Thacker Pass project is the largest of these. Clay processing is less proven at scale than the other two routes, which is why these projects draw close attention to their capital cost estimates.

Lithium products: spodumene, carbonate and hydroxide

Lithium is sold at several points in the chain, and prices quoted for “lithium” can refer to any of them.

Most spodumene has historically been shipped to China for refining into carbonate or hydroxide, and new refineries in Australia, North America and Europe are trying to change that. Spodumene and refined chemical prices don’t always move together either, because the refiner’s margin widens and narrows with supply. When you compare lithium producers, check which product and which unit their output figures use, since a tonne of concentrate and a tonne of LCE are very different amounts of lithium.

Types of lithium mining companies

People searching for a lithium mining companies market cap ranking usually find lists that mix very different businesses. They fall into roughly four groups:

• Integrated chemical producers such as Albemarle and SQM own mines or brine operations and sell refined lithium chemicals.
• Diversified miners with a lithium division, such as Rio Tinto after its purchase of Arcadium Lithium.
• Pure hard-rock miners that sell spodumene concentrate, many of them listed on the ASX.
• Developers and lithium exploration companies with a deposit or a license but no production yet.

Chinese groups such as Tianqi and Ganfeng sit across mining and refining and hold stakes in mines abroad. Market capitalization rankings move with share prices every day, so we don’t print one; exchange websites and financial data services show current values. Our profile of the largest lithium mining companies covers who owns which mines, and the piece on evaluating lithium mining stocks explains what investors usually compare.

Working for lithium miners in Western Australia

Western Australia hosts most of Australia’s hard-rock lithium mines and several refineries, so it is where most lithium jobs are. Many mine-site roles are fly-in fly-out, with rosters that vary by company. Refinery and processing jobs near Perth and Kwinana are residential.

If you are comparing employers, ask about the roster and camp, the site’s safety record, and how the company handled the last downturn. When lithium prices fell sharply in 2023 and 2024, several Western Australian operations cut output or moved to care and maintenance, and the jobs went with them. Producers with low costs and long mine lives tend to be the steadier places to work through the cycle.

Lithium exploration and where new supply comes from

Pegmatites are often small and scattered, so lithium exploration companies spend much of their early budget working out which outcrops on a license deserve sampling and drilling. Satellite data helps here: it can map the rock types and alteration that tend to sit around pegmatites, and hyperspectral imagery adds the narrow bands some lithium minerals need.

Our satellite mineral detection service ranks Exploration Targets across a license so field teams start with the most promising ground. It works ahead of a JORC or NI 43-101 resource estimate and is never a replacement for one. In the Nigeria lithium case study, a 300-hectare license was screened this way.