Today it is plainly visible that this will be no new pair of leaves but my first ever Lithops flower.
The second head grows a flower bud, too, by the way.
It's so interesting to see this and I will document it on a daily basis if I can. Even the first bit of the flower bud shows similar markings than the leaves of the lesliei.
Lithops lesliei with the beginnings of a flower bud on August 20, 2008