Matthew Poole and continuators on Exodus 25:7

7 Onyx-stones , and stones to be set in the Ephod, and in the breast-plate .

Or, Sardonyx-stones. Note, that the signification of the Hebrew Names of the several stones are not agreed upon by the Jews at this day, and much more may we safely be ignorant of them, the religious use of them being now abolished.

Stones of fulness, or filling, or perfecting stones, so called either because they did perfect and adorn the Ephod, or because they filled up the ouches or the hollow places, which were left vacant for this purpose.

What the Ephod and Breast-plate were. See Exod. 28.

Marginal references: chap. 28. 4.; chap. 28. 15.