I have sowed quite a few Lithops these past weeks and I am delighted that most of them germinated (except those rotten otzeniana...).
These are a cultivar: C162B olivacea var. nebrownii (sowed on January 26, 2010).
When they are older they will (hopefully) look like this.
Lithops olivacea var. nebrownii (C162B) on July 23, 2010