8 materiali visualizzati. Produzione e riserve sono USGS Mineral Commodity Summaries 2026 · Stime 2025, metallo contenuto o peso lordo secondo la definizione della fonte per ciascuna commodity · fonte ↗
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| Materiale | Scafo | Produzione mondiale 2025 | Riserve mondiali | Produttore principale | Importato dagli Stati Uniti | |
|---|---|---|---|---|---|---|
| Boron critico An element that makes glass resist thermal shock, fibreglass strong, and — with iron and… | Minerali industriali | non pubblicato | — | Turkey — W% of world production | — | B |
| Dysprosium critico A heavy rare earth added in small amounts to magnets so they keep working when they get hot. | Elementi delle terre rare | non pubblicato | — | — | — | Dy |
| Neodymium critico The rare earth at the heart of the strongest magnet ever made — the kind in headphones, hard… | Elementi delle terre rare | non pubblicato | — | — | — | Nd |
| Praseodymium critico Neodymium's near-twin, so alike that magnet makers usually do not bother separating the two and… | Elementi delle terre rare | non pubblicato | — | — | — | Pr |
| Rare Earths (all) critico A family of seventeen metals that are not actually rare in the ground, but are hard to separate… | Elementi delle terre rare | 390,000metric tons · Mine production | 85,000,000 | — | — | |
| Samarium critico The rare earth in the magnet that works where neodymium cannot: very hot, or very cold, or in a… | Elementi delle terre rare | non pubblicato | — | — | — | Sm |
| Strontium A soft metal whose salts burn bright red, which is why every red firework contains it. | Minerali industriali | 450,000metric tons · Mine production | — | — | 100% | Sr |
| Terbium critico The scarcest of the four magnet rare earths, used in tiny quantities to make a magnet survive… | Elementi delle terre rare | non pubblicato | — | — | — | Tb |
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Boron
An element that makes glass resist thermal shock, fibreglass strong, and — with iron and neodymium — the strongest…
Dysprosium
A heavy rare earth added in small amounts to magnets so they keep working when they get hot.
Neodymium
The rare earth at the heart of the strongest magnet ever made — the kind in headphones, hard drives, wind turbines and…
Praseodymium
Neodymium's near-twin, so alike that magnet makers usually do not bother separating the two and sell them together as…
Rare Earths (all)
A family of seventeen metals that are not actually rare in the ground, but are hard to separate from each other because…
Samarium
The rare earth in the magnet that works where neodymium cannot: very hot, or very cold, or in a place that must not…
Strontium
A soft metal whose salts burn bright red, which is why every red firework contains it.
Terbium
The scarcest of the four magnet rare earths, used in tiny quantities to make a magnet survive high temperature.