Ruby Ore:
You find ruby ore underground in levels 1-8 or in the Ruby Forest. You can only mine it with a diamond pickaxe or higher
Rubies:
You get rubies by smelting ruby ore in a furnace. You can use it to craft many items.
Ruby Forest:
Ruby Forests are super rare biomes that have orange grass, pink water, tall trees with ruby ore as fruits, and a pink sky. Ruby Guards are the only mob that spawns. Guard Blocks can sometimes replace some stone in this biome.
Ruby Huts:
Ruby Huts have a slight chance of generating in a Ruby Forest. Ruby huts kind of looks like a Witch Hut. Ruby Huts have two chests. These chests can contain rubies, ruby ore, ruby swords, ruby pickaxes, and some diamonds. Ruby Huts also generate with four wither skeletons inside and a Ruby Guard spawner below it.