Stones in the Bible in general represent truths, or things we know concerning the Lord and what He wants from us and for us in life. This is why the people of Israel built altars of stone, and is also why stoning was a principal form of capital punishment (using truth to destroy falsity, or in the negative sense using falsity to destroy truth). It is also why precious stones are described in such detail on Aaron's breastplate and ephod, and also in the New Jerusalem in Revelation; precious stones represent true ideas directly from the Lord with the various colors showing various forms of love. Stones are not alone in representing truth, of course -- it sometimes seems that almost everything in the Bible represents either true ideas or desires for good. But that makes sense, since our thoughts and our desires together are everything we are in life, and the interplay between them is what life is all about. The many ways they are represented in the Bible reflect the incredible variety in our feelings and thoughts, though we can only distantly understand how those representations work. In the case of stones, in their weight, strength and permanence they tend to represent true ideas that come from a desire for good, the understanding we can have if we are truly good and loving -- and in the highest sense the exalted ideas that come from the Lord's love. Those ideas are ones that are not easily moved or changed, and make wonderful foundations for the things we want to build in our spiritual lives.

148. All in the heavens have their own places of abode in accordance with the quarters. Those who are in the good of love dwell towards the east and west, those who are in clear perception of it towards the east, and those who are in obscure perception of it towards the west. Those who are in wisdom from the good of love dwell towards the south and north-those who are in the clear light of wisdom towards the south, and those who are in obscure light of it towards the north. The angels of the Lord's spiritual kingdom and those of His celestial kingdom dwell in a like order, but differently as their good of love and light of truth from good differ; for in the celestial kingdom the love is love to the Lord, and the light of truth therefrom is wisdom; while in the spiritual kingdom there is love towards the neighbor, which is called charity, and the light of truth therefrom is intelligence, which is also called faith (see above, 23). The quarters differ also in the two kingdoms by thirty degrees, as has been said just above (146).