Argyroderma
Argyroderma is not directly related to lithops but looks like a "Living stone"
Flowers come in different colours, even in the same species
Argyroderma delaetii puple flower
Argyroderma delaetii orange flower
Argyroderma delatii white flower
Argyroderma congregatum TS 702
Argyroderma pearsonii HH 4966 Grootgraafwater