E. crenulata , one of the largest and most spectacular Echeverias, has frilly, felted leaves. Both its leaves and flowers are fire engine red. It is very tender and must be protected from frost. E. x 'Curly Locks' forms a tight rosette of frilly blue leaves edged in pink. It reminds me of a head of looseleaf lettuce.
Propagation is by offsets.
Echeveria x set-oliver, a hybrid, has pubescent bright green leaves edged in maroon. It is semi-shrubby. Everyone who sees this demands a cutting. Flowers are a scarlet red, tipped in apricot yellow. Used under License.