Young Gibbaeum nuciforme leaf-pairs may bulge and shine with succulence when moisture is readily available. Very fine, pale, velvety hairs are present upon the leaves, maybe only when they’re young. Only about the top third of the leaf bodies are separate, split into an unequal pair with a slit between the rounded leaf tips. The leaf-body diameter is about 2 cm and its height around 3 cm when life is easy, meaning when it is not too dry.
The leaf damage in picture may be from browsing by game or stock, although at that height it should be called grazing (Vlok and Schutte-Vlok, 2015; Smith, et al, 1998; iNaturalist).