Isaiah
Isaiah 54:12BSB·traditional attribution

I will make your pinnacles of rubies, your gates of sparkling jewels, and all your walls of precious stones.

Matthew Henry Presbyterian @wholebiblehenry

Very precious promises are here made to the church in her low condition, that God would not only continue his love to his people under their troubles as before, but that he would restore them to their former prosperity, nay, that he would raise them to greater prosperity than any they had yet enjoyed.

Commenting on Isaiah 54:11-17

John Gill Reformed Baptist @doctorgill

And I will make thy windows of agates,.... Some sort of which stones, Pliny (x) says, were valued for their clearness like glass; but the stone which bears this name with us is not clear and lucid enough to make windows of.

Jamieson-Fausset-Brown Reformed @jfbcommentary

windows--rather, "battlements"; literally, "suns"; applied to battlements from their radiated appearance. agates--rather, "rubies." carbuncles--literally, "sparkling gems"; the carbuncle when held to the sun becomes like a burning coal. all thy borders--rather, "thy whole circuit," consisting of precious stones. The glory of the Church on earth, when the Hebrew Church, according to the original design, shall be the metropolis of Christendom.