Bastnasite -

Bastnäsite is a critical and the world's primary source of light rare-earth elements (REEs) , particularly cerium, lanthanum, and neodymium. It is prized industrially for high-tech manufacturing and by collectors for its rare, brilliant gemstone varieties. Key Characteristics & Origins Composition: Primarily a cerium fluoride carbonate (

), often containing other light rare earths like lanthanum, yttrium, and thorium. bastnasite

Known for producing some of the highest-quality crystal specimens. Industrial Significance Bastnäsite is a critical and the world's primary

The dominant deposit in the United States. containing roughly 80% of global reserves.

The world's largest deposit, containing roughly 80% of global reserves.