CaptainSparklez Legendary Emerald Artifact/Advancement

As per a new survival episode, he was poking fun at not being able to spot any diamond, but instead kept encountering single veins of emerald.

To make light of the situation, he started to make a joking reference that if you mine 8 emerald before seeing any diamond, you unlock a Legendary Emerald Chestplate.

But was able to find at least 9 emeralds before finding any diamond.

I thought this might actually be an interesting addition to have a rare item, or to get an advancement.

The unlockable is broken if any exposed diamond enters your pov while searching for emeralds. You cannot already have the Diamonds! advancement either. You can't use a pick with Fortune.

You get either an item like a one time craftable Emerald Chestplate, or an Emerald Block with some unique status effects or comes already enchanted, like the Enchanted Golden Apple, or get and advancement to brag about.

It was meant as a joke, but it might a fun way to try to hunt for emeralds.