They look funny already!
Lithops olivacea var. nebrownii seedlings on February 15, 2010
It's easy to notice that by far not all Lithops seedlings look the same. Even at this point they can be distinguished by their form. Lithops that are going to be roundish later on will be roundish as seedlings as well. Like these olivacea (they are C162B by the way).
The olivacea mix I grew a few years ago had even more round seedlings than these are. They were real little balls. But they grew well and many of them survived so that makes me optimistic!