The white flowers of Gibbaeum heathii in the photo have slight pink or purple, hinting at other flower colours the species is capable of.
Even the young leaf-pairs growing from within the older ones in picture lack the green colouring sometimes present when these plants find the living easy. Still, the juices stored up in the leaves are likely to sustain flowering, fruiting and the setting of seed (Vlok and Schutte-Vlok, 2015; Smith, et al, 1998; iNaturalist).