Exodus 28:19 Halakhah

וְהַטּ֖וּר הַשְּׁלִישִׁ֑י לֶ֥שֶׁם שְׁב֖וֹ וְאַחְלָֽמָה׃

and the third row a jacinth, an agate, and an amethyst;

Read halakhic rulings (Jewish law) on Exodus 28:19: and classical halakhic sources.