Crystal
In Ezekiel 1:22, this signifies the spiritual divine in heaven. (Apocalypse Explained 931[2])
In Revelation 22:1, this signifies divine truth shining from interior good. (Apocalypse Explained 253[4])
In Revelation 4:6, this signifies the new heaven which is constituted by Christians who had been in general truths from the literal sense of the Word. (Apocalypse Revealed 238)
Exodus 27:1-8
1
"You shall make the altar of acacia wood, five cubits long, and five cubits broad; the altar shall be foursquare: and its height shall be three cubits.
2
You shall make its horns on its four corners; its horns shall be of one piece with it; and you shall overlay it with brass.
3
You shall make its pots to take away its ashes, its shovels, its basins, its flesh hooks, and its fire pans: all its vessels you shall make of brass.
4
You shall make a grating for it of network of brass: and on the net you shall make four bronze rings in its four corners.
5
You shall put it under the ledge around the altar beneath, that the net may reach halfway up the altar.
6
You shall make poles for the altar, poles of acacia wood, and overlay them with brass.
7
Its poles shall be put into the rings, and the poles shall be on the two sides of the altar, when carrying it.
8
You shall make it with hollow planks. They shall make it as it has been shown you on the mountain.
