And he that sat was to look upon - Was in appearance; or, as I looked upon him, this seemed to be his appearance. He does not describe his form, but his splendor.
Like a jasper - ἰάσπιδι iaspidi The jasper, properly, is "an opaque, impure variety of quartz, of red, yellow, and also of some dull colors, breaking with a smooth surface. It admits of a high polish, and is used for vases, seals, snuff-boxes, etc. When the colors are in stripes or bands, it is called striped jasper" (Dana, in Webster's Dictionary). The color here is not designated, whether red or yellow. As the red was, however, the common color worn by princes, it is probable that that was the color that appeared, and that John means to say that he appeared like a prince in his royal robes. Compare Isaiah 6:1.
And a sardine stone - σαρδίῳ sardiō This denotes a precious stone of a bloodred, or sometimes of a flesh-color, more commonly known by the name of carnelian (Robinson's Lexicon). Thus, it corresponds with the jasper, and this is only an additional circumstance to convey the exact idea in the mind of John, that the appearance of him who sat on the throne was that of a prince in his scarlet robes. This is all the description which he gives of his appearance; and this is:
(a) entirely appropriate, as it suggests the idea of a prince or a monarch; and,
(b) it is well adapted to impress the mind with a sense of the majesty of Him who cannot be described, and of whom no image should be attempted. Compare Deuteronomy 4:12; "Ye heard the voice of the words, but saw no similitude."
And there was a rainbow round about the throne - This is a beautiful image, and was probably designed to be emblematical as well as beautiful. The previous representation is that of majesty and splendor; this is adapted to temper the majesty of the representation. The rainbow has always, from its own nature, and from its associations, been an emblem of peace. It appears on the cloud as the storm passes away. It contrasts beautifully with the tempest that has just been raging. It is seen as the rays of the sun again appear clothing all things with beauty - the more beautiful from the fact that the storm has come, and that the rain has fallen. If the rain has been gentle, nature smiles serenely, and the leaves and flowers refreshed appear clothed with new beauty: if the storm has raged violently, the appearance of the rainbow is a pledge that the war of the elements has ceased, and that God smiles again upon the earth. It reminds us, too, of the "covenant" when God did "set his bow in the cloud," and solemnly promised that the earth should no more be destroyed by a flood, Genesis 9:9-16. The appearance of the rainbow, therefore, around the throne, was a beautiful emblem of the mercy of God, and of the peace that was to pervade the world as the result of the events that were to be disclosed to the vision of John. True, there were lightnings and thunderings and voices, but there the bow abode calmly above them all, assuring him that there was to be mercy and peace.
In sight like unto an emerald - The emerald is green, and this color so predominated in the bow that it seemed to be made of this species of precious stone. The modified and mild color of green appears to everyone to predominate in the rainbow. Ezekiel (Ezekiel 1:28) has introduced the image of the rainbow, also, in his description of the vision that appeared to him, though not as calmly encircling the throne, but as descriptive of the general appearance of the scene. "As is the appearance of the bow that is on the cloud in the day of rain, so was the appearance of the brightness round about." Milton, also, has introduced it, but it is also as a part of the coloring of the throne:
"Over their heads a crystal firmament,
Whereon a sapphire throne, inlaid with pure.
Amber, and colors of the showery arch."
- Paradise Lost, b. vii.

And he that sat - There is here no description of the Divine Being, so as to point out any similitude, shape, or dimensions. The description rather aims to point out the surrounding glory and effulgence than the person of the almighty King. See a similar description Numbers 24:10, etc., and the notes there.

(4) And he that sat was to look upon like a jasper and a sardine stone: and [there was] a rainbow round about the throne, in sight like unto an emerald.
(4) By his nature, in that he is the Father, most glorious in his own person, and with his glory outshining all other things.

And he that sat was to look upon like a jasper,.... For the brightness, glory, and majesty of his countenance, and for his being light itself, clothed with it, and dwelling in it; see Revelation 21:11; and for the various perfections of his nature, as eternity, infinity, immutability, omniscience, omnipotence, omnipresence, wisdom, power, goodness, truth, love, grace, and mercy; for the jasper, at least one sort of them, is of various colours, and spotted with divers spots; that which is most valued is the green, spotted with red or purple (h): hence this stone, which is the twelfth in the high priest's breastplate, and on which the name of "Benjamin" was written, is called, by the Chaldee paraphrase of Onkelos on Exodus 28:20, "Pantere", and of ben Uzziel, on the same place, "Apanturin", and on Song 5:14, "Apantor", because some are variegated and spotted like panthers.
And a sardine stone; the same with the "Sardius": and so read here the Alexandrian copy, the Syriac and Arabic versions, as in Revelation 21:20, and in Exodus 28:17 on which Reuben's name was written; this is of a red, or blood colour as its name in Hebrew, shows, and the same that is called a cornelian; and is expressive of the fiery indignation of God whose fury is poured out like fire, and who nakedly and absolutely considered, is a consuming fire to the wicked, his enemies, and the enemies of his church and people. Some jaspers being white and sky coloured and the white colour being most agreeable to deity, as Cicero says (i), and the sardine being red, and a gem of the ruby kind make up the description of the church's beloved; Song 5:10; and may denote in general his purity, glory, and excellency, and in particular good will to his people, and wrath to his enemies. And to the comfort of the former it is added,
and there was a rainbow round about the throne; which signifies the covenant of grace; see Genesis 9:12. The rainbow is a reverberation, or a reflection of the beams of the sun upon a thin watery cloud; and the covenant of grace is owing to Jesus Christ, the sun of righteousness; it is he that has formed it, and filled it with blessings and promises; he is the Mediator, surety, and messenger of it, and who in Revelation 10:1 is represented as clothed with a cloud, and a rainbow on his head: the rainbow is of, various colours and fitly expresses the various promises and blessings, in the covenant of grace, and the various providences, both prosperous and adverse, with respect to soul and body; and as the rainbow was an emblem of mercy, peace, and reconciliation in God to man, after he had destroyed the world by a flood, so the covenant is a covenant of grace and mercy; it springs from it, and is full of it, and provides for the peace and reconciliation of the people of God, by the blood of Christ; whence it is called a covenant of peace: and as the rainbow is a security to the world, and the inhabitants of it, from a destruction by a flood any more, so the covenant is a security to those who are interested in it, from eternal destruction, and wrath to come; herein lies all their salvation, and this is the security of it: to which may be added, that God calls it my bow, as he often calls the covenant of grace my covenant, in distinction from man's; see Genesis 9:12; and this being round about the throne of God, shows that the covenant of grace does, as it were, include and enclose God in his persons, and in his perfections; all the three divine Persons have a concern in it, and all the divine perfections are glorified by it; and it being around it, it is always in his view; he is ever mindful of it, and constantly remembers it for the good of his people, and faithfully keeps it; and it being in this form denotes, that in whatsoever way he comes forth unto his people, it is always in a covenant way, whether it be in things temporal or spiritual, in adversity or prosperity, with regard to the things of time and eternity; nor is there any coming to him with comfort, but as he is encompassed with the rainbow of the covenant; stripped of this, he is like the jasper and sardine stones, full of sparkling majesty, dread and terror, so that there is no coming nigh him; but being encircled with the rainbow, he may be approached as a covenant God, as the God of all grace, seated on a throne of grace, whither believers may come with boldness, freedom, and cheerfulness: and this rainbow was
in sight like unto an emerald; the stone on which Judah's name was written, in the high priest's breastplate; this is of a green colour, which colour is the prevailing one in the rainbow; it is of an exceeding fine green, very delightful to the eye, and gives pleasure to the mind to look upon it: and what a lovely and delightful sight is the covenant of grace to a believer! to see God as a covenant God, Christ as the Mediator of it, the exceeding great and precious promises and blessings, both of grace and glory, which are in it, yields an unspeakable pleasure to such persons; the covenant of grace, like the emerald, is ever green, it is always new; its promises and blessings are always fresh, and, like that, it is durable; it is sure, and cannot be broken, and is more immovable than rocks and mountains: the emerald is very bright, clear, and transparent; it is reported of Nero (k), that he could see in his emerald the combat of the gladiators in the theatre; in the covenant of grace, as in a glass, may be seen the glory of all the three Persons in the Godhead, for it is ordered in all things for the glory of each Person; as also all the perfections of the divine nature; here God appears abundant in goodness and truth; here mercy and truth meet together; and righteousness and peace kiss each other: to which may be added, that the emerald is said (l) to help and refresh the memory; now though God stands in no need of any thing to bring things to his remembrance, yet such is his condescension to men, that he sets the rainbow in the cloud, to look at, that he might remember his everlasting covenant; and so he allows his people to put him in remembrance, by making mention of the covenant of grace, and pleading the promises of it. The Alexandrian copy and the Ethiopic version, instead of "a rainbow", read "priests".
(h) Albert. Magn. de Reb. Metall. l. 2. c. 8. Ruaeus de Gemmis, l. 2. c. 1. (i) De Legibus, l. 2. (k) Ruaeus de Gemmis, l. 2. c. 4. (l) Ruaeus, ib. & Albert. Magn. de Reb. Metall. l. 2. c. 17.

was--omitted in the two oldest manuscripts but supported by Vulgate and Coptic.
to look upon--Greek, "in sight," or "appearance."
jasper--From Revelation 21:11, where it is called most precious, which the jasper was not, EBRARD infers it was a diamond. Ordinarily, the jasper is a stone of various wavy colors, somewhat transparent: in Revelation 21:11 it represents watery crystalline brightness. The sardine, our cornelian, or else a fiery red. As the watery brightness represents God's holiness, so the fiery red His justice executing fiery wrath. The same union of white or watery brightness and fiery redness appears in Revelation 1:14; Revelation 10:1; Ezekiel 1:4; Ezekiel 8:2; Daniel 7:9.
rainbow round about the throne--forming a complete circle (type of God's perfection and eternity: not a half circle as the earthly rainbow) surrounding the throne vertically. Its various colors, which combined form one pure solar ray, symbolize the varied aspects of God's providential dealings uniting in one harmonious whole. Here, however, the predominating color among the prismatic colors is green, the most refreshing of colors to look upon, and so symbolizing God's consolatory promises in Christ to His people amidst judgments on His foes. Moreover, the rainbow was the appointed token of God's covenant with all flesh, and His people in particular. Hereby God in type renewed to man the grant originally made to the first Adam. The antitype will be the "new heavens and the new earth" restored to redeemed man, just as the earth, after the destruction by the flood, was restored to Noah. As the rainbow was first reflected on the waters of the world's ruin, and continues to be seen only when a cloud is brought over the earth, so another deluge, namely, of fire, shall precede the new heavens and earth: the Lord, as here, on His throne, whence (Revelation 4:5) proceed "lightnings and thunderings," shall issue the commission to rid the earth of its oppressors: but then, amidst judgment, when other men's hearts fail them for fear, the believer shall be reassured by the rainbow, the covenant token, round the throne (compare DE BURGH, Exposition of Revelation). The heavenly bow speaks of the shipwreck of the world through sin: it speaks also of calm and sunshine after the storm. The cloud is the regular token of God's and Christ's presence, for example, in the tabernacle's holiest place; on Mount Sinai at the giving of the law; at the ascension (Acts 1:9); at His coming again (Revelation 4:7).

And he that sat was in appearance - Shone with a visible lustre, like that of sparkling precious stones, such as those which were of old on the high priest's breastplate, and those placed as the foundations of the new Jerusalem, Revelation 21:19-20. If there is anything emblematical in the colours of these stones, possibly the jasper, which is transparent and of a glittering white, with an intermixture of beautiful colours, may be a symbol of God's purity, with various other perfections, which shine in all his dispensations. The sardine stone, of a blood - red colour, may be an emblem of his justice, and the vengeance he was about to execute on his enemies. An emerald, being green, may betoken favour to the good; a rainbow, the everlasting covenant. See Genesis 9:9. And this being round about the whole breadth of the throne, fixed the distance of those who stood or sat round it.