The "seastar"

Echeveria subrigida ‘Fire and Ice’ 

Leaves with red edges and a nearly iridescent sheen make this succulent appear to glow like a seastar in a sunlit tidepool. Echeverias tend to stretch with too little light, so give this large (18-inch-wide) echeveria sun or bright shade. Here, a colony of ghost plants (Graptopetalum paraguayense) surrounds it.