ytterbite

Etymology

From Ytterby + -ite.

ytterbite means Gadolinite: a black, vitreous mineral consisting primarily of silicates of various rare earths including ytterbium Lexicurio rates it Rare gem — a strength score of 71 out of 100.

noun

Gadolinite: a black, vitreous mineral consisting primarily of silicates of various rare earths including ytterbium