Spoiler: Mauricio
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Mauricio studies the object on the pedestal. He can tell for sure that some of the tines don’t move as they morph seamlessly into the handle. For the internal ones, after a moment of study, he concludes that they can’t move or rotate or anything either, as the clearly static tines would prevent their motion. Although he can’t say for sure, the structure of the object largely supports Gurmok’s interpretation of it as a key. Likely one where picking the lock is essentially impossible.