The Ghost Plant is native to Mexico and is also known as the Mother of Pearl Plant.
The plant has gray rosettes with a purplish undertone. It's a member of the crassulaceae family that includes the popular Jade Plant.
This plant is incredibly hardy and wants to be left alone. If handled too much the leaves will drop off. This isn't that bad of a thing as the leaves are easily propagated by just laying them on damp potting soil and you'll have a new Ghost Plant in no time.
I've been expecting it to bloom this summer with small white flowers. I'm still waiting.