from
http://www.crassulaceae.com/bo...
Some seed has been produced locally, so that the plants are not wholly self-sterile.
and
from
http://www.crassulaceae.com/bo...
Many species of Echeveria are more or less self-incompatible and each plant will produce few or no viable seeds when polliĀnated by itself.
so... i would give it a try