Hi,
I have to appologize: I am familiar with the Hebrew terminology and I'm not sure I know to translate it to English. In Hebrew it is called אורים ותומים (Urim & tumim). It was put on the חושן(Hoshen)
that was carried by the chief / head of priests and through it they could send (transmit) and receive messages from God. It is mentioned in the Bible only until King David's time and once more in Ezra & Nechemia.
Best regards,