Agates — The proper signification of the Hebrew names of precious stones is unknown to the Jews themselves. It may suffice us to know that this was some very clear and transparent, and precious stone. Thy borders — The utmost parts or walls.
Related Commentaries of Isaiah 54:12
Isaiah 54:12
12 And I will make thy windows of agates, and thy gates of carbuncles, and all thy borders of pleasant stones.