KYIV (Reuters) - U.S. President Donald Trump said on Monday he wanted Ukraine to supply the country with rare earths in return for financially supporting Kyiv's war effort against Russia.

The remark appears to overlap with part of a war strategy, known as the "victory plan", that President Volodymyr Zelenskiy presented to Kyiv's allies, including Donald Trump, last autumn.

Among other things, the plan proposes reaching agreements with foreign partners to provide joint access to Ukraine's strategically valuable resources.

It was not immediately clear if Trump was referring to all types of critical minerals or just to rare earths. He said the United States was looking to do a deal with Ukraine for "their rare earths and other things."

Rare earths are a group of 17 metals used to make magnets that turn power into motion for electric vehicles, cell phones, missile systems and other electronics. There are no known substitutes.

China, with whom Trump has threatened a trade war, is the world's largest producer of rare earths and many other critical minerals.

Trump has also expressed interest in making Greenland, an autonomous territory of Denmark which also sits on large rare earth deposits, a part of the U.S. since his reelection.

The U.S. Geological Survey considers 50 minerals to be critical, including several types of rare earths, nickel and lithium.

Ukraine has deposits of 22 of the 34 minerals identified by the European Union as critical, according to economy ministry data. This includes industrial and construction materials, ferroalloy, precious and non-ferrous metals and some rare earth elements. Ukraine also has significant reserves of coal; however, most of them are now under the control of Russia in occupied territory.

Following is an overview of Ukraine's natural resources that could be of interest to the U.S. and other partners.

WHAT ARE UKRAINE'S RARE EARTHS AND WHAT ARE THEY USED FOR?

Known as the bread basket of Europe, Ukraine also boasts vast mineral resources.

Some of those critical raw materials are essential for industries such as defence, high-tech appliances, aerospace and green energy.

According to the Institute of Geology, Ukraine possesses rare earth elements such as lanthanum and cerium, used in TVs and lighting, neodymium, used in wind turbines and EV batteries, as well as erbium and yttrium, whose applications range from nuclear power to lasers. The European Union-funded research also indicates that Ukraine has scandium reserves. Detailed data on reserves are classified.

Mining analysts and economists said that Ukraine does not have any commercially operating rare earth mines.

According to the World Economic Forum, Ukraine is a key potential supplier of materials including titanium, lithium, beryllium, manganese, gallium, uranium, zirconium, graphite, apatite, fluorite and nickel.

The Ukrainian State Geological Service said the country holds the largest titanium reserves in Europe, or about 7% of the world's reserves and has one of Europe's largest confirmed lithium reserves estimated at 500,000 metric tons - vital for batteries, ceramics, and glass. Titanium reserves are mostly located in central Ukraine, while lithium is in the centre, east and southeast of the country.

Ukraine's reserves of graphite, a key component in electric vehicle batteries and nuclear reactors, represent 20% of global resources. The deposits are in the centre and west of the country.

WHICH UKRAINIAN RESOURCES ARE UNDER KYIV'S CONTROL?

The war has caused widespread damage across Ukraine and Russia now controls around a fifth of the country's territory.

The bulk of Ukraine's coal deposits, which powered Ukraine's steel industry before the war, are concentrated in the east and have been lost.

About 40% of Ukraine's metal resources are now under Russian occupation, according to estimates by Ukrainian think-tanks We Build Ukraine and the National Institute of Strategic Studies, citing data up to the first half of 2024. They provided no detailed breakdown.

Since then, Russian troops have continued to advance steadily in the eastern Donetsk region. In January, Ukraine closed its only coking coal mine outside the region's city of Pokrovsk, which Moscow's forces are trying to capture.

Russia has occupied at least two Ukrainian lithium deposits during the war - one in Donetsk and another in the Zaporizhzhia region in the southeast. Kyiv still controls lithium deposits in the central Kyrovohrad region.

WHAT ARE THE OPPORTUNITIES AND CHALLENGES FOR MINING IN UKRAINE?

Oleksiy Sobolev, first deputy economy minister, said in January the government was working on deals with Western allies, including the United States, Britain, France and Italy on projects related to exploiting critical materials. The government estimates the total sector's investment potential at about $12-15 billion by 2033.

The State Geological Service said the government was preparing about 100 sites to be jointly licensed and developed but provided no further details.

Although Ukraine has a highly qualified and relatively inexpensive labour force and developed infrastructure, investors highlight a number of barriers to investment, including inefficient and complex regulatory processes, as well as difficulty accessing geological data and obtaining land plots.

Such projects would take years to develop and require considerable up-front investment, they said.