Gelatop, people are free to keep guessing until I post whether anyone is right. People only read the hint and then post, so the result isn't spoiled by other members. It makes perfectly sense for DieAutobahn to not read your post. I would've done the same thing ^-^
To solve the mystery of the hint:
Scientists have discovered that Quarrex's face, along with its crown, together resemble a 'crest'. The gems that are present on this crest differ depending on the location of where Quarrex is found. Thus, they now speak of different clans of Geodude, Graveler and Golem in Bombur when there's a Quarrex around.














