The Stones of the New Jerusalem

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, 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.

Revelation 21:19-20

The description of the foundations of the New Jerusalem mentions twelve different stones. Immediately, this brings to mind the twelve stones on the high priest’s breastplate. 
Revelation 21:19-20.

Each stone represented one of the twelve tribes:

On the outside of the breastplate and placed in gold settings were twelve precious stones in four rows of three stones each. On each of the stones was inscribed the name of one of the tribes of Israel, presumably in the order of their births, as was the case with the onyx stones on the shoulders (Ex. Ex. 28:10). The order and names of the stones are listed in Exodus 
Ex. 28:17-20. 

Stones of the Tribes of Israel
Birth Order	Tribe	Majority Stone14	Alternate Stones
1	Reuben	sardius	ruby (NASB95, NIV, NET), carnelian (NRSV, TNK)
2	Simeon	topaz	chrysolite (NRSV, TNK)
3	Levi	carbuncle	emerald (DBY, NASB95, NKJV, NRSV, TNK), beryl (NET, NIV)
4	Judah	emerald	turquoise (NASB95, NET, NKJV, NRSV, TNK), carbuncle (DBY)
5	Dan	sapphire	-
6	Naphtali	diamond	emerald (NET, NIV), moonstone (NRSV), amethyst (TNK)
7	Gad	jacinth	opal (DBY, MKJV, YLT), ligure (KJV)
8	Asher	agate	-
9	Issachar	amethyst	crystal (TNK)
10	Zebulun	beryl	chrysolite (DBY, NET, NIV, MKJV)
11	Joseph	onyx	lapis lazuli (TNK)
12	Benjamin	jasper	-

http://www.biblestudytools.com/commentaries/revelation/revelation-21/tribal-stones.html

He brought me to the banqueting house, and his banner over me was love.

Song of Solomon 2:4

The 12 Tribes of Israel Banners - Detailed Study

Twelve tribal standards of Israel presented in birth order 

- Bazalel School presentation

The stones and banners of Israel are discussed in this video.

Watching Judah

The study of these symbols is fascinating...

I'm still learning about this glorious aspect of God's revelation. 

Many, O LORD my God, are the wonders which You have done, 

And Your thoughts toward us; There is none to compare with You. 

If I would declare and speak of them, They would be too numerous to count. 

Psalm 40:5

I heard a loud voice of a great multitude in heaven, saying, 

“Alleluia! Salvation and glory and honor and power 

belong to the Lord our God! 

Rev.19:1

Then I looked, and, behold, in the firmament 

that was above the head of the cherubims 

there appeared over them as it were a sapphire stone, 

as the appearance of the likeness of a throne. 

Ezekiel 10:11

9 February 2016 - Indian scientists study chunk that fell from sky, killed man

https://forthtell.wordpress.com/2016/02/10/is-it-true-man-is-the-crystal-cracking-portent-of-firmament-failure/

Sources:

http://www.biblestudytools.com/commentaries/revelation/revelation-21/tribal-stones.html

http://thetencommandmentsministry.us/ministry/emblems/

http://4-hobby.com/store/product.php?productid=17686

http://banahtorah.blogspot.com/2006/07/12-tribes-of-israel-banners.html

https://www.pinterest.com/bliss30/12-tribes/

http://www.biblecartoons.co.uk/ency/jacob-s-sons-their-tribal-banners

http://www.biblefragrances.com/studies/fourbanners.html