It's called the breastplate of Aaron and God had something to say about the one who was ordained with every precious stone.
"The word of the Lord came to me: “Son of man, take up a lament concerning the king of Tyre and say to him: ‘This is what the Sovereign Lord says:
“‘You were the seal of perfection,
full of wisdom and perfect in beauty.
You were in Eden,
the garden of God;
every precious stone adorned you:
carnelian, chrysolite and emerald,
topaz, onyx and jasper,
lapis lazuli, turquoise and beryl.
Your settings and mountings[c] were made of gold;
on the day you were created they were prepared.
You were anointed as a guardian cherub,
for so I ordained you.
You were on the holy mount of God;
you walked among the fiery stones.
You were blameless in your ways
from the day you were created
till wickedness was found in you.
Through your widespread trade
you were filled with violence,
and you sinned.
So I drove you in disgrace from the mount of God,
and I expelled you, guardian cherub,
from among the fiery stones.
Your heart became proud
on account of your beauty,
and you corrupted your wisdom
because of your splendor.
So I threw you to the earth;
I made a spectacle of you before kings.
By your many sins and dishonest trade
you have desecrated your sanctuaries.
So I made a fire come out from you,
and it consumed you,
and I reduced you to ashes on the ground
in the sight of all who were watching.
All the nations who knew you
are appalled at you;
you have come to a horrible end
and will be no more.’”