Hi there again, Anıl!
Yes, I though the same when looking closer to the surface of the
Lithops salicola C 351.
Sadly almost
ALL of the nice
Lithops I´ve shown here are DEAD now! They grow fine for me for about six months and then suddenly I slide into a catastrophy!
I was called a "troll" in a German cacti forum because I shew some of my nice Lithops and then just ten days or so later I numbly reported of the sudden decay of many of them! That ironically was the result of following the advices of professional growers!

Take deep containers when you grow Lithops and take pure pumice as medium. *Hahahahahaha!*
The reason was very simple: Indoors there is not so much air movement then outside or in a greenhouse and composts dry out much slowlier. I used a 16 cm deep balcony box to put my Lithops in all together -->
"Lithops are best grown in company!" Of course; they can easily feel lonely!
After six weeks first bodies suddenly collapsed! I knew I have to water sparsely! The surface was bonedry. The upper 7 cm were bonedry, but the lower 9 cm were still moist and the roots of the Lithops have intensely expanded - taking all the available space! And you know: As long as there is moisture Lithops and other Mesembs suck it in. Finally some plants burst and others rot!
The plants I´ve posted here have mainly died after my application of grain alcohol against spider mites!
The
"Otzenianas" are all dead except
acf. "Aquamarine". And to my very surprise
Lithops optica acf. "Rubra" C 287 and
C 81A - which are reported to be
extremely picky - have survived the grain alcohol attack!
Strange world but I´m happy about that fact sometimes!
Best regards
Andreas
Edited by Andreas Eils, 14 September 2011 - 14:24 PM.