Beautiful clump. L. salicola is an interesting species. It deals reasonable well with poor watering habits, can develop large clumps, and puts on a great late season flowering display, as your photos attest to. You grow some great plants Alain. Hope you and your plants are having a nice autumn season.
Lithops salicola is sometimes looked down on as being easy but I think it is very worthwhile. We had some snow flurries today. I hope your plants are all tucked up.