The story
From Bastnäs + -ite. Named after its type locality, the Bastnäs mine near Riddarhyttan, Västmanland, Sweden.
Etymology from Wiktionary, CC BY-SA 4.0.
bastnaesite
Today it means: A yellow-brown mineral that is a source of several rare earth metals, especially gadolinium, samarium, and neodymium. Full definition →