allanite
A mineral belonging to the epidote group, often containing rare earth elements. Used in geological and mineralogical contexts.
Allanite is a mineral commonly found in granitic pegmatites.
Variant spelling using katakana レン for the second character.
The name 褐簾石 (かつれんせき) is a Japanese-coined term for the mineral allanite. 褐 (brown) refers to its typical color, 簾 (bamboo blind) may describe its crystal habit, and 石 (stone) indicates a mineral. The exact derivation of 簾 in this context is uncertain.