Top-most, Keter means "Crown"
So sublime, incomprehensible, unknowable. The infinite, the stream from which Ein Soph is channeled. Pure consciousness, beyond all, timeless. The opening, a singularity from which the Sephirot are created.
A silver rim, adorned with a single drop of pure light dancing to an unknowable rhythm. It thrums in the dark and a melody pours from it, slow and out of Time.
OK, it's probably more of a Euclid/Keter object, or even a Safe object, considering that the Jewish people have no prophesized doomsday.
Pure consciousness will "serve" the singularity, while posing no clear "threat" to humanity.