Rainbow Diamonds by Borisplayruss

This mod adds rainbow diamonds that drop from rainbow diamond ore, which spawns in caves within the deepslate layer at altitudes between -20 and -50. You can craft tools from these diamonds—specifically a rainbow pickaxe, axe, shovel, hoe, and sword—all of which are powerful and durable. You can also craft armor: a helmet that grants infinite Night Vision, a chestplate that grants infinite Strength, leggings that grant infinite Speed, and boots that also grant infinite Speed.