Trump’s meeting with Zelensky comes as Washington and Kyiv hammer out a mineral deal, with war aid on the line. But the value of Ukraine’s minerals is murky.

Ukraine has agreed to the terms of a deal that would allow the U.S. access to the country's rare earth and critical minerals reserves.

Analysts questions the size of Ukraine's natural resources deposits, how accessible they are and easy to extract, and the ultimate value of a potential deal.