Arcana Coelestia #1020
1020. That these things are meant becomes clear from the fact that everything put together as history from Genesis 1 down to Eber in Chapter 11 means something different from what appears in the letter, and from the consideration that the historical narratives there are purely made-up history customary among the most ancient people. When attesting the truth of some matter they would say that 'Jehovah said it'. Here however 'God' is used because the subject is the spiritual Church. And they did the same when anything true was being, or had been, put into effect.
Precious stones
In Exodus 28:17, this signifies the celestial love of good. (Arcana Coelestia 9862) 'Lazuli, agate, and amethyst' denote the spiritual love of good. 'Beryl, onyx, and jasper' denote spiritual love of truth and 'sardine' signifies divine truth. 'Ruby, topaz, and carbuncle' signify the celestial love of good because of their red, flaming color. 'A covering of precious stones,' as in Ezekiel 28:13, signifies the truths of intelligence. 'Precious stones,' in application to the Word, symbolize the Divine truth of the Word in its literal sense which the Divine truth in its spiritual sense shines through. 'Chrysoprasus, sapphire, and diamond' denote celestial love of truth. 'Emerald' signifies the sphere of divine love and wisdom.
(References: Apocalypse Revealed 911)