Exodus 28:21

28:21 The stones are to be for the names of the sons of Israel, twelve, according to the number of their names. Each name according to the twelve tribes is to be like the engravings of a seal.

Exodus 28:32

28:32 There is to be an opening in its top in the center of it, with an edge all around the opening, the work of a weaver, like the opening of a collar, so that it cannot be torn.

Exodus 30:32

30:32 It must not be applied to people’s bodies, and you must not make any like it with the same recipe. It is holy, and it must be holy to you.