I made a texture pack that replaces emeralds with rubies, and makes the ruby fit the modern Minecraft style. Hope this hasn't done already. : r/Minecraft
Ruby Ore Minecraft Texture Pack
ruby ore | Nova Skin
Ruby ore block | Minecraft Skin
Pixilart - Ruby ore by GearX
Ruby
Ruby Ore | Nova Skin
Block of Ruby | Minecraft Wiki | Fandom
NEW ORE 'Ruby' To improve mining – Minecraft Feedback