This mod currently adds a full set of emerald armor, an emerald sword, pickaxe, axe, shovel, and even bow!
It uses Fabric API, so in order to play it, you must first install that: https://fabricmc.net/use/.
You must also download the Fabric JAR file and place it into the mods folder as normal: Fabric API - Mods - Minecraft - CurseForge.
Emerald tools and gear are highly enchantable (almost as high as gold) and deal more damage, yet they have slightly worse durability.
The bow is rapid-fire and has pierce (3 units) while the armor has Knockback Resistance I and Toughness I.
Crafting recipes are as expected, except for the bow, which uses emeralds instead of sticks for the handle.
Lastly, this mod is probably best for complementing regular vanilla gameplay (for a bit of extra utility) but also works just as well for larger packs.
Thanks for trying my creation out! Feel free to ask any questions down below.