The interpretation timeline
Isaiah 54:12 Douay-Rheims

And I will make thy bulwarks of jasper: and thy gates of graven stones, and all thy borders of desirable stones.

1105 – 1871 6 witnesses

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“jasper Heb. כַּדְכֹד, a kind of precious stone. your windows Jonathan renders: your woodwork, and Menahem associated it with (Dan. 7:10): “ministered to Him (יְשַׁמְּשׁוּנֵהּ).” (Menahem, apparently renders: your utensils, i.e., the vessels that serve you.) And some interpret it as an expression of a sun (שֶׁמֶשׁ), windows through which the sun shines, and they make opposite it a barrier of kinds of colored glass for beauty, and Midrash Psalms interprets שִׁמְשׁוֹתַיִךְ as well as שֶׁמֶשׁ וּמָגֵן (Ps. 84:12) as “the pinnacles of the wall.” of carbuncle stones Heb. אֶקְדָּח. Jonathan renders: of gomer stones. Gumrin is the Aramaic translation of גֶּחָלִים, coals. He interprets אֶקְדָּח as an expression similar to (supra 50: 11) “who kindle (קֹדְחֵי) fire,” and they are a type of stones that burn like torches and that is the carbuncle (karbokle in O.F.), an expression of a coal. Others interpret it as an expression of a drill, i.e., huge stones of which the entire opening of the doorway is drilled, and the doorposts, the threshold, and the lintel are all hewn from the stone. of precious stones Desirable stones [from Jonathan].”
Source
1167
A.D.
Ibn Ezra Jewish
1089–1167
כדכד Agates. It is hap. leg.; it is the name of a precious stone. ושמשתיך And thy windows. It is derived from שמש sun. It signifies the apertures, which are closed with glass in stately palaces. ושעריך And of thy gates. And the windows of thy gates. אקדח Carbuncles. A precious stone. The א is prosthetic; comp. קדחה is kindled (Deut. 32:22). To stones that are desired, that are not like those stones which are thrown about, and are of no value.”
Source
1256
A.D.
Thomas Aquinas Catholic
1225–1274
“Sing, O barren one. Here, against the casting down of things, he promises the remedy of exaltation: and first he promises a multitude against a paucity; second, the restoration of honor against confusion, do not fear; third, prosperity against former adversity, poor little one. Concerning the first he does three things. First he foretells the multitude of children, indicating the praise of thanksgiving: "O barren one" — Jerusalem, who do not bear; "because forsaken" — deserted; "sing" — to God, for the benefits granted. The gladness of those who praise: "sing forth praise" — for a song is the exultation of the mind broken forth into voice; and the greatness of the gladness: "neigh" — in the manner of a horse, unable because of the greatness to form a voice to express it. Jer. 31: Exult in gladness, Jacob. Ps. 146: Let praise of our God be pleasant and comely. And promising the multitude of children: "because many" — as if to say, your children will be multiplied more, although you are deserted, than that of the cities which have husbands for begetting. 1 Reg. 2: until the barren woman has borne very many, and she who had many children is weakened. Second he exhorts to the enlargement of the place, under the metaphor of a tent: "enlarge the place" — as to the ground on which it is extended; "the skins" — by which it is covered; "the cords" — by which the pegs are bound; "the nails" — by which the boards are joined, or the pegs themselves. And these are read to have been in the tabernacle of the covenant: Exod. 26, and 36. On account of this multitude of men it is fitting to seek a greater dwelling than the land of promise is. Above, 49: still the children of barrenness say, etc. Third he foretells the fulfillment of the exhortation: "for to the right hand" — as if to say, you shall spread yourself on every side: which was fulfilled in the time of the Maccabees, when certain cities from the region of Samaria, and from others, were added to the kingdom of the Jews. Gen. 24: may your seed possess the gates of your enemies. Do not fear. Here he promises the restoration of former honor, against the confusion which they had previously endured. Second, the firmness of the promise: as in the days of Noah. Concerning the first he does two things. First he promises the forgetting of the former confusion: "you shall not be confounded" — inwardly; "you shall not blush" — outwardly. "You shall be ashamed" — from the consideration of your baseness; "you shall forget" — because of the abundance of glory; "of youth" — when you sinned in the desert; "of widowhood" — when you were separated from God in the captivity of Babylon. Above, 45: you shall not be confounded, nor shall you blush. Sopho. 3: in that day you shall not be confounded for all your devisings. Second he promises the restoration of former honor: and first he sets down the restoration as to dominion, "because he shall rule"; above, 26: O Lord, they have possessed us; and as to marriage, "a forsaken wife." Jerem. 3: if a man put away his wife, and she depart from him and marry another man, shall she return to him any more? Second he promises the enlargement of honor as to the multitude of honors: "says the Lord" — "in a little" — you have suffered little in respect of the things which I, having mercy, shall bestow on you. 2 Corinth. 4: for that which is at present is momentary. And as to duration, "in a moment" — as if to say: for a brief time you have felt my anger, in respect of that in which I will have mercy on you. Above, 26: hide yourself a little while. But all these things that have been said are expounded mystically of the calling of the Gentiles: because the Gentile world, barren at first, afterward gathered many children, according to the Gloss. As in the days. Here he shows the firmness of the promise. And first from the likeness of the former promise: "I have sworn" — I have firmly determined, provided, however, that you remain in my precepts. Gen. 9: I will establish my covenant with you, and with your seed after you. Eccli. 44: the covenants of the age. Second, from the working of stable creatures: "for the mountains" — as if to say: it is easier for mountains and hills to be changed than for my words to be made void. Or by mountains and hills, the powerful of the world. Ps. 45: we will not fear, while the earth is troubled. Note on that word, "sing, O barren one," that there is a barrenness, first, of perverse action. Job 15: the congregation of the hypocrite is barren. Second, of sacred contemplation. Genes. 29: Rachel was barren. Third, of temporal tribulation. Above, 49: the children of barrenness shall still say in your ears. Likewise note, on that phrase "enlarge the tent," that the heart must be enlarged, first, on account of the greatness of the guest. Jerem. 23: do not I fill heaven and earth, says the Lord? Second, on account of the multitude of gifts. Below, 60: you shall see, and abound, and your heart shall be enlarged. Third, on account of the fulfilling of the way. Psalm. 118: I have run the way of your commandments. Likewise on that phrase "in great mercies," that the mercies to come are great: first because they are intrinsic. Rom. 8: I reckon that the sufferings of this time are not worthy to be compared to the glory to come that shall be revealed in us. Second, because they are eternal. 2 Cor. 4: for the things which are seen are temporal; but the things which are not seen are eternal. Third, because they are perfect. Luc. 1: for behold, from now on all generations shall call me blessed. Fourth, because they are extended to many. Luc. 14: a certain man made a great supper, and invited many. Fifth, because they are whole. Apoc. 21: God shall wipe away every tear from the eyes of the saints. Poor little one. Here he promises prosperity against adversity: and first he recalls the former adversity: "poor little one" — Jerusalem despoiled of goods; "by tempest" — by adversity. Above, 18: to a nation rent and torn I will send you. Second he promises future prosperity, both as to the abundance of goods, setting forth a metaphor: "behold I will lay" — as it were in a pavement, by the "stones," "precious," signifying men eminent in virtues, "in order," each one in his own order: Tob. 13: the gates of Jerusalem; and explaining it as to the doctrine of divine knowledge: "all" — Jer. 31: I will give my law in their bowels, and write it in their heart. As to the abundance of peace: "multitude." Psalm. 118: much peace have they that love your law. And as to the justice of works: "and in justice." Above, 1: Sion shall be redeemed in judgment; and they shall bring her back in justice. Second, as to the freedom from evils, promising first the escape from dangers: "depart" — that is, you shall depart, because you shall not suffer calumny. Ps. 71: he shall humble the slanderers. Second, the adherence of strangers: "behold, the sojourner" — because many from among the Gentiles going forth from captivity adhered. Below, 56: let not the son of the stranger, who adheres to the Lord, say: the Lord will divide me by separation from his people. Third, promising the destruction of enemies: "behold I." And first he shows the power of the one promising, setting forth a comparison: "the smith" — the persecutor, who blows upon the vessels in the fire of tribulation, adversaries, according to his own will: Job 41: his breath, coals; and explaining it: "I have created." 1 Reg. 2: the Lord kills and makes alive. Second he sets forth the promise: "every vessel" — that is, he will scatter every thing formed, as to those who assail by deeds; and "every tongue," as to those who assail by words. Above, 41: and they shall be as if they were not.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“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. The Septuagint, Vulgate Latin, Syriac, and Arabic versions, render it, "of jasper", a stone more fit for that purpose; and it is interpreted of the jasper in the Talmud (y); so "the light" of the New Jerusalem is said to be like unto the "jasper stone", Rev 21:11. Some take the crystal to be meant, which suits well with windows; the word (z) for which has its name from the sun, because by means of them the rays and light of the sun are let into a house, and illuminate it; these in a figurative sense may design the ministers of the Gospel, who are the lights of the world, especially of the church; and the word and ordinances administered by them, by means of which the light of spiritual knowledge, joy, and comfort, is let into the churches, and into the souls of men, from Christ, the sun of righteousness. The phrase signifies, that in the latter day their ministrations should be very clear and bright, and be greatly owned, and be very successful: "and thy gates of carbuncles"; precious stones so called from their fiery flaming colour. The gates of the New Jerusalem are said to be so many pearls, Rev 21:21 which there, as here, signify the entrance into the church of God, which is through Christ, who is the door into it, and through faith in him, which works by love; these gates will be open in the latter day to receive many, who will come in great numbers, and are called "praise", Isa 60:11, which will be expressed in very warm and lively strains of love and affection, of which the carbuncle may be a symbol: and all thy borders of pleasant stones; true believers, called "lively stones", and who are pleasant in the sight of God and Christ, and are taken pleasure in by one another; see Psa 102:14. The Septuagint and Arabic versions render it, "thy wall", which agree with Rev 21:18, where the wall of the New Jerusalem is said to be of jasper. (x) Nat. Hist l. 37. c. 10. (y) T. Bab. Bava Bathra, fol. 75. 1. (z) "a radice, quae solem significat", Sanctius,”
Source
1849
A.D.
1774–1849
“Bulwarks. Hebrew, windows of crystal; (Ezechiel xxvii. 1[].; Calmet) Protestants, “of agate.” (Haydock) — All this is allegorical, like the redemption of the new Jerusalem, Apocalypse. xxi.”
1871
A.D.
1871
“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.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.