268. Verse 3. And He that sat was in aspect like to a jasper stone and a sardius, signifies the Lord's appearance in respect to Divine truth pellucid by virtue of the Divine good of the Divine love. This is evident from the signification of "One sitting upon the throne," as being the Lord in respect to the Last Judgment (of which just above, n. 267; and from the signification of "in aspect like," as being appearance; from the signification of "jasper stone," as being the spiritual love of truth (of which in what follows); and from the signification of a "sardius stone" as being the celestial love of good; thus "a jasper stone and a sardius," which the Lord appeared like, signify Divine truth pellucid, by virtue of the Divine good of the Divine love.

[2] That a "jasper" signifies the Divine love of truth, or Divine truth proceeding, is evident from passages in the Word where it is mentioned, as Exodus 28:20; and Ezekiel 18:13; also in Revelation:

The light [luminare] of the holy Jerusalem was like unto a stone most precious, as it were a jasper stone, shining like crystal (Revelation 21:11);

"the light of the holy Jerusalem" signifies the Divine truth of the church shining, "the light" truth itself shining, and "Jerusalem" the church in respect to doctrine; this is likened to "a jasper stone," because "jasper" has a like signification.

Again:

The building of the wall [of the holy Jerusalem] was of jasper, and the city was pure gold, like unto pure glass (Revelation 21:18).

The "wall" of the holy Jerusalem is said to be "of jasper," because "wall" signifies Divine truth guarding; and because of this signification of "wall," the first stone of its foundation is said to be jasper (verse 19), "foundation" signifying the truth upon which the church is founded.

[3] The "sardius" is mentioned because that stone signifies good, here Divine good, because the Lord is described. This is the stone that is called "pyropus" [firestone], and since it shines as by fire, both names signify the translucency of truth from good. (That all precious stones signify the truths from good of heaven and of the church, see Arcana Coelestia 114, 9863, 9865, 9868, 9873; for this reason twelve precious stones were set in the breastplate of Aaron, which is called the Urim and Thummim, and by them responses were given, and this by their shining forth, and at the same time by a perception as to the thing interrogated or by a living voice, n. 9905)

114. The truth of faith was also meant and represented in the Word precious stones, for example, those in the breast plate of judgement, and upon the shoulder-pieces of Aaron's ephod. in the breastplate, the gold, blue, purple, double-dyed scarlet, and fine-twined linen represented matters of love, while the precious stones represented matters of faith deriving from love, as did the two stones of remembrance on the shoulder-pieces of the ephod which were made from shoham encompassed with settings of gold, Exodus 28:9-22. The same point, that the truth of faith is meant and represented by precious stones, is plainly stated in Ezekiel when the subject is the person who possesses the heavenly riches of wisdom and intelligence,

Full of wisdom and perfect in beauty, you were in Eden, the garden of God. Every precious stone was your covering ruby, topaz, diamond, tarshish, shoham, and jasper, sapphire, chrysoprase, and emerald. And gold, the work of your drums and of your pipes, was within you. On the day that you were created they were prepared. You were perfect in your ways from the day you were created. Ezekiel 28:12-13, 15.

Anyone may see that celestial and spiritual things of faith, and not just stones, are meant. Indeed each stone represented a particular essential element of faith.