Exodus 28:17

28:17 You are to set in it a setting for stones, four rows of stones, a row with a ruby, a topaz, and a beryl – the first row;

Exodus 28:21

28:21 The stones are to be for the names of the sons of Israel, twelve, according to the number of ¹  their names. Each name according to the twelve tribes is to be like ²  the engravings of a seal.

[28:21]  ¹ tn For clarity the words “the number of” have been supplied.

[28:21]  ² tn The phrase translated “the engravings of a seal” is an adverbial accusative of manner here.