Which rare-earth minerals provide mostly light lanthanides?

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A line graph showing electron probability distributions for gadolinium, with separate curves for 4f, 5s, 5p, 5d, and 6s orbitals. The x-axis shows distance from the nucleus in atomic units and the y-axis shows probability P2(r). — rare-earth element Electron probabilities, P²*(r)*, for the 4f, 5s, 5p, 5d, and 6s electrons of gadolinium.

Rare-earth minerals are generally classified as "light" or "heavy" based on the atomic weight of the elements they primarily contain. Minerals that provide mostly light lanthanides—specifically lanthanum, cerium, praseodymium, neodymium, samarium, and europium—include the following:1

Bastnasite: A primary source of light lanthanides, typically containing 60–70%.1
Monazite: A major source of light lanthanides, containing 50–78%.1
Loparite: Contains 32–34% light lanthanides.1
Allanite: Primarily contains light lanthanoids.1
Apatite: Primarily contains light lanthanoids.1
Perovskite: Primarily contains light lanthanoids.1
Sphene: Primarily contains light lanthanoids.1

Among these, bastnasite, monazite, and loparite are currently mined as significant commercial sources of light lanthanides, accounting for a large portion of the rare earths in use today.1