Exodus 35:9 Midrash

וְאַ֨בְנֵי־שֹׁ֔הַם וְאַבְנֵ֖י מִלֻּאִ֑ים לָאֵפ֖וֹד וְלַחֹֽשֶׁן׃

and onyx stones, and stones to be set, for the ephod, and for the breastplate.

Read midrashic interpretation of Exodus 35:9: and classical rabbinic exegesis.