Emerald Gear Mod

1.12.2:
Adds Emerald Chips, Tools, Sword, & Armor
Better than a diamond but less durability

1.12.2 is No Longer updated 

1.15.2:
Emerald Armor, Tools, & Sword
Emerald armor is a little bit stronger than diamond
Emerald sword and Axe do the same amount of damage as diamond
Emerald stuff has the same enchantability as gold stuff which is better than diamond and tools are as fast as gold tools which are faster than diamond
Emerald Tools and sword have extremely high attack speed so they can basically be spammed except
Tools have 750 durability

This is a link to the resource pack for the classic textures for this mod, made for 1.15.2 version

1.18.2:

Adds Emerald armor, tools, & sword
Enchantabily of Emerald gear is the same as gold(higher than diamond).
Durability of tools & sword is about half of diamond.
Mining speed of tools is the same as gold(higher than diamond)
Durability of armor is higher than iron but much less that diamond.
Armor has knockback resistance.