riburi = ruby (noun) (gemstone) (some things Google found for "riburi": a rare term; may mean something in Japanese; a user name; a short story titled "The Riburi Hat" was published in 1984 in Mike Shayne Mystery Magazine; may mean something in Romanian)
Word derivation for "ruby" :
Basque = errubi, Finnish = rubiini
Miresua = riburi
The Basque and Finnish words for "ruby" are similiar. To make the Miresua word a little different I changed "rubi", the common letter combination, to "ribu".