It features a flattened-spherical, grey-green to light-green stem growing 2 to 4 cm tall and 6 to 9 cm wide.
The body is structured into 6 to 7 pronounced ribs broken by deep transverse furrows, creating distinct, protruding tubercles that resemble human chins.
It features 5 to 9 backward-curving radial spines (1 to 2.5 cm long) that wrap closely against the body of the plant. They vary from yellowish-brown to grey with darker tips. Central spines are usually entirely absent.
Under intense, bright sunlight, the green epidermis develops a stunning reddish, copper, or bronze hue.
