There is a Emerald (range dps) and Topaz (tank). I always wondered if they ever intended for a third Ruby Carbuncle as a melee dps with stat/dot effects or Healing-support pet, that never happened. In 3.X Alphinaud Summoned a Ruby Carbuncle,.... (that little troll of a nerd.). For whatever the reason they couldn't give three carbuncle summons they could at least make three of them as minions and give them an effect when they are all together.