Gabbro men are extremely rare creatures made of solid gabbro, found exclusively at the third layer of the caverns. Like other golem creatures, they are non-sentient, feel no pain or fear, cannot be stunned and don't need to breathe. They are as large as humans and are level 2 building destroyers. Gabbro men are immortal and only die to violence.
Gabbro men are deadly to the average dwarf and will usually kill unarmed civilians. Punches and kicks will glance away from their stone hide, but some may deliver lucky bites which can fracture them. Gabbro men should nonetheless be engaged with an equipped military before they can wreck havoc among dwarves and buildings. When killed, gabbro men turn into a rough gabbro boulder which can be used by your masons or stone crafters.
Some dwarves like gabbro men for their rockiness.