Assay notes
Short articles built on the USGS 2025 tables: each one answers a single question with a ranked table drawn from the data.
- Which minerals depend most on one country
The largest single-country share in every USGS world table, ranked.
- Where battery minerals are mined
Lithium, cobalt, nickel, graphite and manganese: producers, growth and reserves.
- Which minerals the United States imports most
Net import reliance for every commodity, from 100% down to net exporter.
- Where the reserves are not where the mines are
Minerals whose largest reserves lie outside the top producing country.
- Which mineral outputs grew or shrank in 2025
World output changes from 2024 to 2025 for every mineral with two totals.
- Who produces the U.S. critical minerals
Top producer, world share and U.S. reliance for each critical mineral.
- Which countries supply U.S. mineral imports
How often each country appears in the U.S. import-source lists.