Seems like a good time to separate them. Or you could water. So long as the oldest leaves are getting softer, you're doing fine.

You can never have enough Lithops

Definitely getting bigger!

Not sen the pink one before. Here's the more typical colour. These are well worth looking at magnified, very intricate patterns and windowing.

Treat them more like Lithops than Conophytums, but don't be too strict about withholding water until the old leaves are gone. Pleiospilos are somewhat opportunistic growers, with P. nelii the most inclined to grow in cooler weather but they'll all grow in summer (in the UK) provided it isn't too hot...

Same here, no flowers on mine yet. My older and much more purple plants flower, but not prolifically.

They look strong! Is that last one L. karasmontana 'Mado-Shugengyoku'?

If you have more than one ...

Mine offset freely. I'd say not much different from the white-haired plants which form generous clumps. My onlt problem with them is what name to put on the label

Flowers must have given the game away?