Sapphire, Throne of God, New Jerusalem

Revelation 21 

19 The foundations of the wall of the city were adorned with all kinds of precious stones: the first foundation was jasper, the second SAPPHIRE, the third chalcedony, the fourth emerald, 20 the fifth sardonyx, the sixth sardius, the seventh chrysolite, the eighth beryl, the ninth topaz, the tenth chrysoprase, the eleventh jacinth, and the twelfth amethyst.

Ezekiel 10:1
Ezekiel 1:26
Exodus 28:18
Exodus 39:11
Exodus 24:10

• Points of interest

• One of the gemstones mentioned in the above video is sapphire.

• Earth is a huge natural magnet 

• Potential conclusions

• New Jerusalem is a physical city as described in revelation. More resources.  More specifically see "Heaven on Earth: An Overview of the Millennial Kingdom" from the above link. 

• Also see An_Overview_of_the_Millennial_Kingdom.pdf 

Then I looked, and behold, on THE EXPANSE that was OVER the HEADS of the CHERUBIM there appeared above them something like a SAPPHIRE, in appearance LIKE a THRONE

And above the EXPANSE OVER their HEADS there was the likeness of a throne, in APPEARANCE like SAPPHIRE; and seated above the likeness of a throne was a likeness with a human appearance.

and the second row an emerald, a SAPPHIRE, and a diamond;

and the second row, a turquoise, a SAPPHIRE and a diamond;

and they SAW the God of Israel. There was UNDER his FEET as it were a PAVEMENT of SAPPHIRE STONE, like the very heaven for clearness.