This grower is fairly sure of this plant identification.
This "ghost"plant has quite a variable appearance depending on light conditions, it can be tinted blue,pink,(sun) or grows pale green in the shade. It is easy to grow survives drought, low temperatures, but the leaves break off (and propagate!) very easily.
Ghost plant, Mother of pearl plant
Graptopetalum papaguayense (Ghost plant). This is the mother-of-pearl plant which is known to be native to Mexico. It will produce dense rosettes of thick, blunt-tipped leaves that are borne on fleshy stems. The leaves are grey with a reddish cast and a silvery blue bloom. The flowers are produced in showy sprays of white star-shaped blooms in the spring which rise well above the rosette and are very long lasting.
Is easy to grow and flower